--- title: "Where the wind speeds up around a tower" url: "https://tryreynolds.com/studies/pedestrian-wind-comfort" description: "Pedestrian wind comfort is a question about one horizontal plane two metres off the ground. Reynolds built the atmospheric boundary layer properly, refined where the answer lives, and solved it in fifteen seconds." --- **[Reynolds](https://tryreynolds.com)** is agentic CFD, built by **[InviscidAI](https://inviscidai.com)** and backed by Y Combinator, Winter 2026 batch. The agent is open source under the MIT licence at [github.com/InviscidAI/OpenReynolds](https://github.com/InviscidAI/OpenReynolds). Using it requires no OpenFOAM knowledge. This is the agent-readable Markdown twin of https://tryreynolds.com/studies/pedestrian-wind-comfort. It lives at https://tryreynolds.com/studies/pedestrian-wind-comfort.md, and [tryreynolds.com/llms.txt](https://tryreynolds.com/llms.txt) indexes every one of them. # Where the wind speeds up around a tower Pedestrian wind comfort is a question about one horizontal plane two metres off the ground. Reynolds built the atmospheric boundary layer properly, refined where the answer lives, and solved it in fifteen seconds. RUN 07APPLIEDBUILT ENVIRONMENTMAY 202620260528-090054-8b1e - **Asked**: “Wind around a tall rectangular building, 10 m/s atmospheric boundary layer approaching it. I want pedestrian-level wind speed at 2 m height and to see where the corner acceleration is worst.” - **Run**: simpleFoam, k-ε with ABL correction · 79,610 cells · 4 cores · 15 seconds - **Result**: Worst corner acceleration 1.16× the reference speed - **Assumed and stated**: Building 16 × 24 × 60 m, U_ref = 10 m/s at 10 m, roughness z₀ = 1.0 m - **Answer**: Worst corner acceleration 1.16× the reference speed, at the upstream windward corner - **Speed ratio range**: 0.02 to 1.16 across the whole pedestrian plane - **Loads**: Drag 226 kN, roof suction 36 kN, side force zero by symmetry ![Wind speed ratio at pedestrian height around a tower](https://tryreynolds.com/assets/bldg-pedestrian-Dz-gmhNO.png) Figure 1 Speed ratio at 2 m: acceleration lobes at the windward corners, shelter in the wake. ## Getting the approaching wind right Wind near the ground is not uniform. It grows from zero at the surface through a logarithmic profile whose shape is set by terrain roughness, and a building responds to the profile it is actually given. Run one of these with a flat inlet velocity and the loads and the pedestrian speeds are both wrong. Reynolds set up an atmospheric boundary layer inlet with a roughness length of 1.0 m, suburban terrain, referenced to 10 m/s at a 10 m height, and used the k-ε model with the ABL correction that keeps that profile from decaying as it convects across the empty upstream domain. It named all three assumed inputs in its report and invited them to be corrected, which is the right posture when the building dimensions and the terrain are the two things a real client would supply. The mesh was refined where the question is: nested refinement boxes around the building and a further one at pedestrian height, because a speed ratio at 2 m is meaningless if the nearest cell centre is at 4 m. 79,610 cells, checkMesh clean at maximum non-orthogonality 31° and skewness 0.69, converged in 258 iterations and about fifteen seconds on four cores. ## The answer, on the plane that was asked about The peak is 1.16 times the reference speed, 11.6 m/s, at the upstream windward corner, with the sheltered wake behind the tower dropping as low as 0.02. That contrast, a factor of nearly sixty between the windiest and calmest points of the same plaza, is exactly why this analysis exists: it is invisible from a drawing and obvious from a field. ## Two answers for the price of one The same solve delivered the structural loads alongside the comfort question: 226 kN of along-wind drag, 36 kN of vertical roof suction, and a side force of zero, which is the correct result for a symmetric building in a head-on wind and therefore a free check that the setup is not skewed. Fifteen seconds of solver time, on a mesh built specifically around the plane the question was about, for a map of where a plaza is comfortable and a first estimate of what the structure carries. ![The rectangular building geometry standing in the computational domain](https://tryreynolds.com/assets/bldg-geometry-B_voKAxD.png) Figure 2 The tower in its domain: 16 by 24 metres in plan, 60 metres tall. ![A vertical slice showing wind accelerating over the roof and recirculating behind](https://tryreynolds.com/assets/bldg-vertical-DtGHM23x.png) Figure 3 Vertical slice: over-roof acceleration and the recirculating wake behind the tower. ## The whole session, exactly as it happened. One prompt in, and everything the agent said and ran on the way to the answer. Open a step to see the command it sent and what came back. Nothing here is rewritten. 25 messages, 127 tool calls ### you Wind around a tall rectangular building, 10 m/s atmospheric boundary layer approaching it. I want pedestrian-level wind speed at 2 m height and to see where the corner acceleration is worst. ### tool: bash `ls /work/.toolbox; echo ---; ls /work/.toolbox/notes; echo ---; cat /work/.too...` exit 0 **input** ``` { "cmd": "ls /work/.toolbox; echo ---; ls /work/.toolbox/notes; echo ---; cat /work/.toolbox/geometry_view.py 2>/dev/null | head -50" } ``` **output** ``` exit_code: 0 README.md __pycache__ animate.py case_gen.py cells_estimate.py first_look.py gallery.py geometry_view.py log_digest.py mesh_digest.py notes preflight.py progress_report.py render.py results.py study_run.py study_state.py --- bundle-layout.md openfoam-agent-architecture.md openfoam-field-notes.md --- #!/usr/bin/env python3 """Surface geometry -> pictures of it, plus the numbers that describe it. Meshing decisions are made against geometry nobody has looked at, and a surface that is 1000x too large, inside-out, or full of holes looks exactly like a good one from the shell. This draws it -- four fixed views, every facet edge visible -- and prints what is measurable about it. It attaches no verdicts: whether 40 open edges matter depends on where they are and what you are about to run. python3 geometry_view.py wing.stl python3 geometry_view.py constant/triSurface/ # every surface in a dir python3 geometry_view.py a.stl b.stl --per-part --out /work/case/renders python3 geometry_view.py wing.stl --check # numbers only, no render Reads anything VTK reads: .stl, .obj, .ply, .vtk, .vtp, .vtu. """ from __future__ import annotations import argparse import sys from pathlib import Path import numpy as np import pyvista as pv pv.OFF_SCREEN = True SUFFIXES = (".stl", ".obj", ".ply", ".vtk", ".vtp", ".vtu") VIEWS = (("iso", "isomet ``` ### tool: bash `ls /work; nproc` exit 0 **input** ``` { "cmd": "ls /work; nproc" } ``` **output** ``` exit_code: 0 20260222-065853-27b6 20260224-051829-530e 20260226-051833-0ac2 20260228-051839-247d 20260302-052207-0bc5 20260304-052318-8511 20260306-054121-29b3 20260308-054504-2920 20260310-055319-be1c 20260311-055436-c910 20260313-061007-c967 20260315-061054-cbe3 20260317-061843-9483 20260319-064555-72c6 20260329-070120-a2be 20260409-072030-97ab 20260428-074352-10ad 20260507-080356-73d0 20260528-090054-8b1e livecheck 4 ``` ### tool: bash `cat /work/.toolbox/README.md` exit 0 **input** ``` { "cmd": "cat /work/.toolbox/README.md" } ``` **output** ``` exit_code: 0 # What is in here Small scripts and some notes, refreshed from the distribution at the start of every session. They are offered, not imposed: use them, edit them, replace them, or ignore them. Nothing checks whether you did. Each takes `--help`. | | | |---|---| | `geometry_view.py` | Surfaces (`.stl`, `.obj`, `.ply`, `.vtk`) drawn from four fixed views with every facet edge and the bounding-box ticks on, plus open edges, non-manifold edges, connected bodies, extents and face-area range. No verdicts: whether 40 open edges matter depends on where they are. | | `mesh_digest.py` | `checkMesh` output as a metric table — the numbers and the patch table, no thresholds applied. | | `cells_estimate.py` | Cell count predicted from the STL and the snappy dictionaries, before the build rather than after it. | | `log_digest.py` | Solver log to a residual plot, a last-iteration table, and the continuity and bounding summary. | | `render.py` | Fixed pyvista scenes for a case: mesh cuts and field slices, as PNGs, with cameras that do not move between runs so two of them are a visual diff. | | `case_gen.py` | Runnable cases from a template name and a few numbers -- 2D external flow (circle, square, L, vehicle, an imported profile), Y/T/Z/F/M ducts, sharp, mitred and rounded bends; mesh-only, steady or transient; moving ground and rotating wheels. Every file it wr ``` ### tool: bash `sed -n '1,200p' /work/.toolbox/case_gen.py` exit 0 **input** ``` { "cmd": "sed -n '1,200p' /work/.toolbox/case_gen.py" } ``` **output** ``` exit_code: 0 #!/usr/bin/env python3 r"""Complete, runnable OpenFOAM cases from a template name and a few numbers. Typing out blockMeshDict, the system and constant dictionaries and a 0/ directory by hand costs most of an hour per study, and the hour is not spent where the thinking is. The mistakes it produces are the dull ones, and they all cost a solver run to find: two cells in z so the "2D" case is quietly 3D and forty times slower; a frontAndBack patch declared `empty` in the mesh and `zeroGradient` in 0/U, which stops the solver on the first time step; a patch called `inlet` in the mesh and `Inlet` in the fields; a viscosity typed in for the Reynolds number somebody meant to run last week. So the shapes are parameterised instead. What comes out is a directory you can run blockMesh in, and every file it contains is one you can open and edit -- nothing here is a black box at run time, and a generated dictionary that is 90% of what you want is meant to be edited the other 10%. what it derives, and says it derived Give it a free-stream speed, a Reynolds number and a characteristic length and it solves nu = U*L/Re and writes that into transportProperties, then prints the three numbers it used. Give it --nu instead and it prints the Reynolds number that implies. The one that is not stated is the one that gets misremembered. The cell count is not an ``` ### tool: bash `cat /work/.toolbox/render.py | grep -n "scene" | head -30` exit 0 **input** ``` { "cmd": "cat /work/.toolbox/render.py | grep -n \"scene\" | head -30" } ``` **output** ``` exit_code: 0 2:"""A few fixed pyvista scenes: mesh cuts and field slices, saved as PNGs. 7: python3 render.py /work/case # latest time, all default scenes 9: python3 render.py /work/case --scene mesh --out /work/case/renders 115: parser.add_argument("--scene", default="all", choices=["all", "mesh", "fields"]) 128: if args.scene in ("all", "mesh"): 130: if args.scene in ("all", "fields"): ``` ### tool: bash `sed -n '1,60p' /work/.toolbox/notes/openfoam-field-notes.md` exit 0 **input** ``` { "cmd": "sed -n '1,60p' /work/.toolbox/notes/openfoam-field-notes.md" } ``` **output** ``` exit_code: 0 # OpenFOAM field notes Distilled from a longer architecture document (`openfoam-agent-architecture.md`, in this directory). These are observations, not a procedure — nothing here is a step you owe anyone. --- ## The cost asymmetry Mistakes are cheap while you are authoring files and expensive once you have committed compute to them. | What you are about to do | What a mistake costs | |---|---| | Write a dictionary | seconds | | `snappyHexMesh` build | 20 minutes to hours | | Production solve | hours to days | | Report a wrong number | the whole study | Everything below is a consequence of that table. The cheapest checks — `foamDictionary` parsing a file, `foamToC` telling you what this build actually compiled in, a one-iteration solver probe on a trivial mesh, an arithmetic cell-count estimate — cost less than a minute and sit directly upstream of the expensive things. ## Verifying against the installation rather than from memory There is no complete static grammar for OpenFOAM dictionaries. It is distributed across the C++ classes that consume each dict, differs by fork and version, and grows with every compiled library. The grammar does exist in one authoritative place: the binaries in front of you. - `foamDictionary -expand ` resolves includes and variables. Good for reading; do not write the expanded form back, ``` ### agent Let me check tutorials for a similar building/ABL case to use as a base (e.g., simpleFoam pitzDaily is not relevant; look for ABL examples). ### tool: bash `find $FOAM_TUTORIALS -iname "*atmBoundaryLayer*" | head; find $FOAM_TUTORIALS ...` exit 0 **input** ``` { "cmd": "find $FOAM_TUTORIALS -iname \"*atmBoundaryLayer*\" | head; find $FOAM_TUTORIALS -ipath \"*ABL*\" | head -20" } ``` **output** ``` exit_code: 0 /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/include/ABLConditions /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/U /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/alpha.water /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/epsilon /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/k /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/nut /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/0.orig/p_rgh /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/Allclean /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/Allrun /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/constant /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/constant/g /usr/lib/openfoam/openfoam2512/tutorials/multiphase/interFoam/laminar/damBreakPermeable/constant/tran ``` ### agent turbineSiting is the relevant ABL tutorial. Let's inspect it as a template basis for BCs, snappyHexMeshDict, fvSchemes/fvSolution. ### tool: bash `find /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbin...` exit 0 **input** ``` { "cmd": "find /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting -maxdepth 3 -type f | sort" } ``` **output** ``` exit_code: 0 /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/U /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/epsilon /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/include/ABLConditions /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/include/fixedInlet /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/include/initialConditions /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/include/sideAndTopPatches /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/k /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/nut /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/0.orig/p /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/Allclean /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/Allrun /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/constant/fvOptions /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/constant/transportProperties /usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting/constant/turbu ``` ### tool: bash `T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSi...` exit 0 **input** ``` { "cmd": "T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting\necho \"== U ==\"; cat $T/0.orig/U\necho \"== ABLConditions ==\"; cat $T/0.orig/include/ABLConditions\necho \"== initialConditions ==\"; cat $T/0.orig/include/initialConditions\necho \"== fixedInlet ==\"; cat $T/0.orig/include/fixedInlet\necho \"== sideAndTopPatches ==\"; cat $T/0.orig/include/sideAndTopPatches\n" } ``` **output** ``` exit_code: 0 == U == /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volVectorField; object U; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // #include "include/initialConditions" dimensions [0 1 -1 0 0 0 0]; internalField uniform $flowVelocity; boundaryField { outlet { type inletOutlet; inletValue uniform (0 0 0); value $internalField; } inlet { type atmBoundaryLayerInletVelocity; #include "include/ABLConditions" } terrain { type uniformFixedValue; value uniform (0 0 0); uniformValue (0 0 0); } ground { type uniformFixedValue; value ``` ### agent This gives me good BC templates. Let me check the k, epsilon, nut, p files too, plus fvSchemes/fvSolution and turbulenceProperties. ### tool: bash `T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSi...` exit 0 **input** ``` { "cmd": "T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting\nfor f in k epsilon nut p; do echo \"== $f ==\"; cat $T/0.orig/$f; done\necho \"== turbulenceProperties ==\"; cat $T/constant/turbulenceProperties\necho \"== transportProperties ==\"; cat $T/constant/transportProperties\n" } ``` **output** ``` exit_code: 0 == k == /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; object k; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // #include "include/initialConditions" dimensions [0 2 -2 0 0 0 0]; internalField uniform $turbulentKE; boundaryField { outlet { type inletOutlet; inletValue uniform $turbulentKE; value $internalField; } inlet { type atmBoundaryLayerInletK; #include "include/ABLConditions" } terrain { type kqRWallFunction; value uniform 0.0; } ground { type zeroGradient; } #include "include/sideAndTopPatches" } // *************** ``` ### tool: bash `T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSi...` exit 0 **input** ``` { "cmd": "T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting\ncat $T/system/fvSchemes\necho ===\ncat $T/system/fvSolution\necho ===\ncat $T/system/controlDict" } ``` **output** ``` exit_code: 0 /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object fvSchemes; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // ddtSchemes { default steadyState; } gradSchemes { default Gauss linear; } divSchemes { default none; div(phi,U) bounded Gauss upwind; turbulence bounded Gauss upwind; div(phi,epsilon) $turbulence; div(phi,k) $turbulence; div((nuEff*dev2(T(grad(U))))) Gauss linear; } laplacianSchemes { default Gauss linear limited corrected 0.33; } interpolationSchemes { default linear; } snGradSchemes { default limited corrected 0.33; } // *********************************************** ``` ### tool: bash `T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSi...` exit 0 **input** ``` { "cmd": "T=/usr/lib/openfoam/openfoam2512/tutorials/incompressible/simpleFoam/turbineSiting\ncat $T/system/blockMeshDict\necho \"=====SNAPPY=====\"\ncat $T/system/snappyHexMeshDict" } ``` **output** ``` exit_code: 0 /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object blockMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // scale 1; vertices ( ( 581321 4.78537e+06 930) ( 582290 4.78537e+06 930) ( 582290 4.78624e+06 930) ( 581321 4.78624e+06 930) ( 581321 4.78537e+06 1500) ( 582290 4.78537e+06 1500) ( 582290 4.78624e+06 1500) ( 581321 4.78624e+06 1500) ); blocks ( hex (0 1 2 3 4 5 6 7) (30 30 20) simpleGrading (1 1 1) ); edges ( ); boundary ( outlet { type patch; faces ( (2 6 5 1) ); } sides { type patch; faces ( (1 5 4 0) (3 7 6 2) ); } ``` ### tool: bash `mkdir -p /work/20260528-090054-8b1e/case/{0.orig,constant/triSurface,system}` exit 0 **input** ``` { "cmd": "mkdir -p /work/20260528-090054-8b1e/case/{0.orig,constant/triSurface,system}\ncd /work/20260528-090054-8b1e/case\nmkdir -p 0.orig/include\npython3 -c \"print('ok')\"" } ``` **output** ``` exit_code: 0 ok ``` ### tool: bash `cat << 'EOF' > /tmp/make_building.py` exit 0 **input** ``` { "cmd": "cat << 'EOF' > /tmp/make_building.py\nimport numpy as np\n\n# Building: footprint Wx (streamwise) x Wy (crosswind) x H (height)\nWx, Wy, H = 16.0, 24.0, 60.0\n# centered at x=0,y=0, base at z=0\nx0, x1 = -Wx/2, Wx/2\ny0, y1 = -Wy/2, Wy/2\nz0, z1 = 0.0, H\n\n# 8 corners\np = {\n 'A': (x0,y0,z0), 'B': (x1,y0,z0), 'C': (x1,y1,z0), 'D': (x0,y1,z0),\n 'E': (x0,y0,z1), 'F': (x1,y0,z1), 'G': (x1,y1,z1), 'H': (x0,y1,z1),\n}\n\ndef tri(a,b,c):\n return (p[a],p[b],p[c])\n\nfacets = []\n# bottom (z0) - normal -z ; but building sits on ground, bottom face not needed (embedded) - skip, snappy just needs closed surface for a box actually surfaces normally include bottom too since it's a stand-alone STL used for refinementRegion/surface. Let's include all faces for a watertight box.\n# bottom ABCD (normal -z)\nfacets += [tri('A','C','B'), tri('A','D','C')]\n# top EFGH (normal +z)\nfacets... ``` **output** ``` exit_code: 0 Wx,Wy,H = 16.0 24.0 60.0 ``` ### agent Now let's check the STL geometry with geometry_view.py before proceeding. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 /work/.toolbox/geometry_view.py constant/triSurface/building.stl --out renders_geom\n" } ``` **output** ``` exit_code: 0 constant/triSurface/building.stl faces 12 points 8 bodies 1 bbox x [-8, 8] y [-12, 12] z [0, 60] extent 16 x 24 x 60 (OpenFOAM reads these as metres) open edges 0 non-manifold edges 0 duplicate points 0 enclosed volume 15360 surface area 5568 face area 192 .. 720 typical edge 33.3 zero-area faces 0 renders_geom/geometry.png ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders_geom/geometry.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders_geom/geometry.png" } ``` **output** ``` [image/png, 47937 bytes] /work/20260528-090054-8b1e/case/renders_geom/geometry.png — 1400x1000 image/png, 47937 bytes ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -c \"\nimport numpy as np\nverts=[]\ntris=[]\nwith open('constant/triSurface/building.stl') as f:\n lines=f.readlines()\ncur=[]\nfor l in lines:\n l=l.strip()\n if l.startswith('vertex'):\n cur.append(list(map(float,l.split()[1:4])))\n if l.startswith('endfacet'):\n tris.append(cur); cur=[]\nvol=0\nfor t in tris:\n a,b,c=[np.array(x) for x in t]\n vol += np.dot(a, np.cross(b,c))/6.0\nprint('signed volume', vol)\n\"\n" } ``` **output** ``` exit_code: 0 signed volume 15360.0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 1 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -c \"\nimport pyvista as pv\npv.OFF_SCREEN=True\nWx,Wy,H = 16.0,24.0,60.0\nbox = pv.Box(bounds=(-Wx/2,Wx/2,-Wy/2,Wy/2,0,H))\nbox = box.triangulate()\nbox.save('constant/triSurface/building.stl')\nprint(box)\n\"\npython3 -c \"\nimport numpy as np\nverts=[]\ntris=[]\nwith open('constant/triSurface/building.stl') as f:\n lines=f.readlines()\ncur=[]\nfor l in lines:\n l=l.strip()\n if l.startswith('vertex'):\n cur.append(list(map(float,l.split()[1:4])))\n if l.startswith('endfacet'):\n tris.append(cur); cur=[]\nvol=0\nfor t in tris:\n a,b,c=[np.array(x) for x in t]\n vol += np.dot(a, np.cross(b,c))/6.0\nprint('signed volume', vol, 'ntris', len(tris))\n\"\n" } ``` **output** ``` exit_code: 1 PolyData (0x2b4ea4b45480) N Cells: 12 N Points: 8 N Strips: 0 X Bounds: -8.000e+00, 8.000e+00 Y Bounds: -1.200e+01, 1.200e+01 Z Bounds: 0.000e+00, 6.000e+01 N Arrays: 2 Traceback (most recent call last): File "", line 6, in File "", line 322, in decode UnicodeDecodeError: 'utf-8' codec can't decode byte 0x80 in position 86: invalid start byte ``` ### agent pyvista saved binary STL. Let's re-check via geometry_view.py directly. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 /work/.toolbox/geometry_view.py constant/triSurface/building.stl --out renders_geom --check" } ``` **output** ``` exit_code: 0 constant/triSurface/building.stl faces 12 points 8 bodies 1 bbox x [-8, 8] y [-12, 12] z [0, 60] extent 16 x 24 x 60 (OpenFOAM reads these as metres) open edges 0 non-manifold edges 0 duplicate points 0 enclosed volume 23040 surface area 5568 face area 192 .. 720 typical edge 33.3 zero-area faces 0 ``` ### agent Good, volume is now correct (23040 = 16×24×60), watertight, single body. Now let's set up the full case: blockMeshDict, snappyHexMeshDict, 0.orig fields, system files. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 1 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ncat > /work/20260528-090054-8b1e/notes_dims.txt << 'EOF'\nBuilding: Wx(streamwise)=16 m, Wy(crosswind)=24 m, H=60 m, base at z=0, centered at x=0,y=0.\nDomain (COST/AIJ-style multiples of H=60):\n upstream 5H = 300 m -> xmin = -300\n downstream 10H = 600 m -> xmax = 600 + 8 (building half-length) ~ 608, round to 620\n sides 5H = 300 m each side -> ymin=-300, ymax=300\n top 6H = 360 m -> zmax = 360\nEOF\ncat notes_dims.txt" } ``` **output** ``` exit_code: 1 cat: notes_dims.txt: No such file or directory ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/blockMeshDict` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/blockMeshDict", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile\n{\n version 2.0;\n format ascii;\n class dictionary;\n object blockMeshDict;\n}\n// Background domain for snappyHexMesh. Building sits inside, meshed by snappy.\n// Building: Wx=16 Wy=24 H=60, centered at (0,0), base z=0.\n// Domain multiples of H=60: upstream 5H=300, downstream ~10H=620, sides 5H=300, top 6H=360.\n\nscale 1;\n\nxmin -300;\nxmax 620;\nymin -300;\nymax 300;\nzmin 0;\nzmax 360;\n\n// background cell size ~ 15 m\nnx 62;\nny 40;\nnz 24;\n\nvertices\n(\n ($xmin $ymin $zmin)\n ($xmax $ymin $zmin)\n ($xmax $ymax $zmin)\n ($xmin $ymax $zmin)\n ($xmin $ymin $zmax)\n ($xmax $ymin $zmax)\n ($xmax $ymax $zmax)\n ($xmin $ymax $zmax)\n);\n\nblocks\n(\n hex (0 1 2 3 4... ``` **output** ``` wrote 1268 bytes to /work/20260528-090054-8b1e/case/system/blockMeshDict ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/snappyHexMeshDict` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/snappyHexMeshDict", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile\n{\n version 2.0;\n format ascii;\n class dictionary;\n object snappyHexMeshDict;\n}\n\ncastellatedMesh true;\nsnap true;\naddLayers false;\n\ngeometry\n{\n building.stl\n {\n type triSurfaceMesh;\n name building;\n }\n\n nearFieldBox\n {\n type box;\n min (-40 -40 0);\n max ( 60 40 90);\n }\n\n pedestrianBox\n {\n type box;\n min (-70 -60 0);\n max (120 60 6);\n }\n}\n\ncastellatedMeshControls\n{\n maxLocalCells 500000;\n maxGlobalCells 1500000;\n minRefinementCells 0;\n maxLoadUnbalance 0.10;\n nCellsBetweenLevels 2;\n\n features\n (\n );\n\n refinementSurfaces\n {\... ``` **output** ``` wrote 2089 bytes to /work/20260528-090054-8b1e/case/system/snappyHexMeshDict ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/include/ABLConditions` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/include/ABLConditions", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object ABLConditions; }\n\nUref 10.0;\nZref 10.0;\nzDir (0 0 1);\nflowDir (1 0 0);\nz0 uniform 1.0;\nd uniform 0.0;\n" } ``` **output** ``` wrote 343 bytes to /work/20260528-090054-8b1e/case/0.orig/include/ABLConditions ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/include/initialConditions` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/include/initialConditions", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object initialConditions; }\n\nflowVelocity (10 0 0);\npressure 0;\nturbulentKE 0.5;\nturbulentEpsilon 0.05;\n" } ``` **output** ``` wrote 273 bytes to /work/20260528-090054-8b1e/case/0.orig/include/initialConditions ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/include/sideAndTopPatches` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/include/sideAndTopPatches", "content": "top\n{\n type slip;\n}\n\nsides\n{\n type slip;\n}\n\n\"proc.*\"\n{\n type processor;\n}\n" } ``` **output** ``` wrote 83 bytes to /work/20260528-090054-8b1e/case/0.orig/include/sideAndTopPatches ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/include/initialConditions` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/include/initialConditions", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object initialConditions; }\n\n// u* = kappa*Uref/ln((Zref+z0)/z0) = 0.41*10/ln(11/1) = 1.71 m/s\n// k = u*^2/sqrt(Cmu) ~ 9.7 m2/s2 ; epsilon = u*^3/(kappa*(Zref+z0)) ~ 1.1 m2/s3\nflowVelocity (10 0 0);\npressure 0;\nturbulentKE 9.7;\nturbulentEpsilon 1.1;\n" } ``` **output** ``` wrote 420 bytes to /work/20260528-090054-8b1e/case/0.orig/include/initialConditions ``` ### agent Now the field files U, p, k, epsilon, nut with patch names inlet/outlet/sides/top/ground/building. ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/U` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/U", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class volVectorField; object U; }\n\n#include \"include/initialConditions\"\n\ndimensions [0 1 -1 0 0 0 0];\n\ninternalField uniform $flowVelocity;\n\nboundaryField\n{\n inlet\n {\n type atmBoundaryLayerInletVelocity;\n #include \"include/ABLConditions\"\n }\n\n outlet\n {\n type inletOutlet;\n inletValue uniform (0 0 0);\n value $internalField;\n }\n\n ground\n {\n type noSlip;\n }\n\n building\n {\n type noSlip;\n }\n\n #include \"include/sideAndTopPatches\"\n}\n" } ``` **output** ``` wrote 707 bytes to /work/20260528-090054-8b1e/case/0.orig/U ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/p` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/p", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class volScalarField; object p; }\n\n#include \"include/initialConditions\"\n\ndimensions [0 2 -2 0 0 0 0];\n\ninternalField uniform $pressure;\n\nboundaryField\n{\n inlet\n {\n type zeroGradient;\n }\n\n outlet\n {\n type uniformFixedValue;\n uniformValue constant $pressure;\n }\n\n ground\n {\n type zeroGradient;\n }\n\n building\n {\n type zeroGradient;\n }\n\n #include \"include/sideAndTopPatches\"\n}\n" } ``` **output** ``` wrote 619 bytes to /work/20260528-090054-8b1e/case/0.orig/p ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/k` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/k", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class volScalarField; object k; }\n\n#include \"include/initialConditions\"\n\ndimensions [0 2 -2 0 0 0 0];\n\ninternalField uniform $turbulentKE;\n\nboundaryField\n{\n inlet\n {\n type atmBoundaryLayerInletK;\n #include \"include/ABLConditions\"\n }\n\n outlet\n {\n type inletOutlet;\n inletValue uniform $turbulentKE;\n value $internalField;\n }\n\n ground\n {\n type kqRWallFunction;\n value uniform $turbulentKE;\n }\n\n building\n {\n type kqRWallFunction;\n value uniform $turbulentKE;\n }\n\n #include \"inc... ``` **output** ``` wrote 814 bytes to /work/20260528-090054-8b1e/case/0.orig/k ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/epsilon` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/epsilon", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class volScalarField; object epsilon; }\n\n#include \"include/initialConditions\"\n\ndimensions [0 2 -3 0 0 0 0];\n\ninternalField uniform $turbulentEpsilon;\n\nboundaryField\n{\n inlet\n {\n type atmBoundaryLayerInletEpsilon;\n #include \"include/ABLConditions\"\n }\n\n outlet\n {\n type inletOutlet;\n inletValue uniform $turbulentEpsilon;\n value $internalField;\n }\n\n ground\n {\n type epsilonWallFunction;\n Cmu 0.09;\n kappa 0.41;\n E 9.8;\n value uniform $turbulentEpsilon;\n }\n\n buil... ``` **output** ``` wrote 1032 bytes to /work/20260528-090054-8b1e/case/0.orig/epsilon ``` ### tool: write_file `/work/20260528-090054-8b1e/case/0.orig/nut` **input** ``` { "path": "/work/20260528-090054-8b1e/case/0.orig/nut", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class volScalarField; object nut; }\n\ndimensions [0 2 -1 0 0 0 0];\n\ninternalField uniform 0;\n\nboundaryField\n{\n inlet\n {\n type calculated;\n value uniform 0;\n }\n\n outlet\n {\n type calculated;\n value uniform 0;\n }\n\n ground\n {\n type atmNutkWallFunction;\n boundNut false;\n z0 uniform 1.0;\n value uniform 0;\n }\n\n building\n {\n type nutkWallFunction;\n value uniform 0;\n }\n\n #include \"include/sideAndTopPatches\"\n}\n" } ``` **output** ``` wrote 741 bytes to /work/20260528-090054-8b1e/case/0.orig/nut ``` ### agent Now constant/ files: transportProperties, turbulenceProperties. ### tool: write_file `/work/20260528-090054-8b1e/case/constant/transportProperties` **input** ``` { "path": "/work/20260528-090054-8b1e/case/constant/transportProperties", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object transportProperties; }\n\ntransportModel Newtonian;\n\nnu 1.5e-05;\n" } ``` **output** ``` wrote 220 bytes to /work/20260528-090054-8b1e/case/constant/transportProperties ``` ### tool: write_file `/work/20260528-090054-8b1e/case/constant/turbulenceProperties` **input** ``` { "path": "/work/20260528-090054-8b1e/case/constant/turbulenceProperties", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object turbulenceProperties; }\n\nsimulationType RAS;\n\nRAS\n{\n RASModel kEpsilon;\n turbulence on;\n printCoeffs on;\n\n kEpsilonCoeffs\n {\n Cmu 0.09;\n C1 1.44;\n C2 1.92;\n sigmaEps 1.11;\n }\n}\n" } ``` **output** ``` wrote 411 bytes to /work/20260528-090054-8b1e/case/constant/turbulenceProperties ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/controlDict` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/controlDict", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object controlDict; }\n\nlibs (atmosphericModels);\n\napplication simpleFoam;\n\nstartFrom latestTime;\nstartTime 0;\nstopAt endTime;\nendTime 1000;\n\ndeltaT 1;\n\nwriteControl timeStep;\nwriteInterval 100;\n\npurgeWrite 2;\n\nwriteFormat binary;\nwritePrecision 8;\nwriteCompression off;\n\ntimeFormat general;\ntimePrecision 6;\n\nrunTimeModifiable yes;\n\nfunctions\n{\n forceCoeffs\n {\n type forces;\n libs (forces);\n patches (building);\n writeControl timeStep;\n writeInterval 50;\n rho rhoInf;\n... ``` **output** ``` wrote 845 bytes to /work/20260528-090054-8b1e/case/system/controlDict ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/fvSchemes` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/fvSchemes", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object fvSchemes; }\n\nddtSchemes\n{\n default steadyState;\n}\n\ngradSchemes\n{\n default Gauss linear;\n}\n\ndivSchemes\n{\n default none;\n div(phi,U) bounded Gauss upwind;\n turbulence bounded Gauss upwind;\n div(phi,epsilon) $turbulence;\n div(phi,k) $turbulence;\n div((nuEff*dev2(T(grad(U))))) Gauss linear;\n}\n\nlaplacianSchemes\n{\n default Gauss linear limited corrected 0.33;\n}\n\ninterpolationSchemes\n{\n default linear;\n}\n\nsnGradSchemes\n{\n default limited corrected 0.33;\n}\n" } ``` **output** ``` wrote 733 bytes to /work/20260528-090054-8b1e/case/system/fvSchemes ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/fvSolution` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/fvSolution", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object fvSolution; }\n\nsolvers\n{\n p\n {\n solver GAMG;\n tolerance 1e-7;\n relTol 0.1;\n smoother GaussSeidel;\n }\n\n U\n {\n solver smoothSolver;\n smoother GaussSeidel;\n tolerance 1e-8;\n relTol 0.1;\n nSweeps 1;\n }\n\n \"(k|epsilon)\"\n {\n solver smoothSolver;\n smoother GaussSeidel;\n tolerance 1e-8;\n relTol 0.1;\n nSweeps 1;\n }\n}\n\nSIMPLE\n{\n nNonOrthogonalCorrectors 1;\n consistent no;\n\n residualCo... ``` **output** ``` wrote 1103 bytes to /work/20260528-090054-8b1e/case/system/fvSolution ``` ### tool: write_file `/work/20260528-090054-8b1e/case/system/decomposeParDict` **input** ``` { "path": "/work/20260528-090054-8b1e/case/system/decomposeParDict", "content": "/*--------------------------------*- C++ -*----------------------------------*\\\nFoamFile { version 2.0; format ascii; class dictionary; object decomposeParDict; }\n\nnumberOfSubdomains 4;\n\nmethod scotch;\n" } ``` **output** ``` wrote 211 bytes to /work/20260528-090054-8b1e/case/system/decomposeParDict ``` ### agent Now let's build the mesh: blockMesh then decomposePar + snappyHexMesh in parallel with 4 cores. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nblockMesh > log.blockMesh 2>&1; tail -30 log.blockMesh" } ``` **output** ``` exit_code: 0 /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; arch "LSB;label=32;scalar=64"; class dictionary; location "system"; object controlDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // --> FOAM FATAL IO ERROR: (openfoam-2512) problem while reading header for object controlDict file: system/controlDict at line 43. From virtual Foam::autoPtr Foam::fileOperations::uncollatedFileOperation::readStream(Foam::regIOobject&, const Foam::fileName&, const Foam::word&, bool) const in file global/fileOperations/uncollatedFileOperation/uncollatedFileOperation.C at line 650. FOAM exiting ``` ### tool: bash `cat -n /work/20260528-090054-8b1e/case/system/controlDict | sed -n '30,48p'` exit 0 **input** ``` { "cmd": "cat -n /work/20260528-090054-8b1e/case/system/controlDict | sed -n '30,48p'" } ``` **output** ``` exit_code: 0 30 { 31 forceCoeffs 32 { 33 type forces; 34 libs (forces); 35 patches (building); 36 writeControl timeStep; 37 writeInterval 50; 38 rho rhoInf; 39 rhoInf 1.2; 40 CofR (0 0 30); 41 } 42 } ``` ### tool: bash `cat -A /work/20260528-090054-8b1e/case/system/controlDict | sed -n '1,10p'` exit 0 **input** ``` { "cmd": "cat -A /work/20260528-090054-8b1e/case/system/controlDict | sed -n '1,10p'\nwc -l /work/20260528-090054-8b1e/case/system/controlDict" } ``` **output** ``` exit_code: 0 /*--------------------------------*- C++ -*----------------------------------*\$ FoamFile { version 2.0; format ascii; class dictionary; object controlDict; }$ $ libs (atmosphericModels);$ $ application simpleFoam;$ $ startFrom latestTime;$ startTime 0;$ stopAt endTime;$ 42 /work/20260528-090054-8b1e/case/system/controlDict ``` ### tool: bash `python3 -c "` exit 0 **input** ``` { "cmd": "python3 -c \"\ns=open('/work/20260528-090054-8b1e/case/system/controlDict').read()\nprint('open',s.count('{'),'close',s.count('}'))\n\"" } ``` **output** ``` exit_code: 0 open 3 close 3 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nfoamDictionary system/controlDict -entry application 2>&1 | tail -20" } ``` **output** ``` exit_code: 0 --> FOAM FATAL IO ERROR: (openfoam-2512) Cannot find entry application file: system/controlDict at line 43. From int main(int, char**) in file foamDictionary.C at line 588. FOAM exiting ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nfor f in system/controlDict system/fvSchemes system/fvSolution system/decomposeParDict system/blockMeshDict system/snappyHexMeshDict constant/transportProperties constant/turbulenceProperties 0.orig/U 0.orig/p 0.orig/k 0.orig/epsilon 0.orig/nut 0.orig/include/ABLConditions 0.orig/include/initialConditions 0.orig/include/sideAndTopPatches; do\n head -3 \"$f\"\n echo \"---- $f\"\ndone" } ``` **output** ``` exit_code: 0 /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object controlDict; } ---- system/controlDict /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object fvSchemes; } ---- system/fvSchemes /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object fvSolution; } ---- system/fvSolution /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object decomposeParDict; } ---- system/decomposeParDict /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { ---- system/blockMeshDict /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { ---- system/snappyHexMeshDict /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object transportProperties; } ---- constant/transportProperties /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object turbulenceProperties; } ---- constant/turbulenceProperties /*------ ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport re, glob\n\nfiles = [\n \"system/controlDict\",\"system/fvSchemes\",\"system/fvSolution\",\"system/decomposeParDict\",\n \"constant/transportProperties\",\"constant/turbulenceProperties\",\n \"0.orig/U\",\"0.orig/p\",\"0.orig/k\",\"0.orig/epsilon\",\"0.orig/nut\",\n \"0.orig/include/ABLConditions\",\"0.orig/include/initialConditions\",\n]\n\npat = re.compile(r'FoamFile\\s*\\{\\s*(.*?)\\s*\\}', re.S)\n\nfor f in files:\n txt = open(f).read()\n m = pat.search(txt)\n if not m:\n print(\"NO MATCH\", f); continue\n body = m.group(1)\n # split entries on ;\n entries = [e.strip() for e in body.split(';') if e.strip()]\n newblock = \"FoamFile\\n{\\n\" + \"\".join(f\" {e};\\n\" for e in entries) + \"}\\n\"\n newtxt = txt[:m.start()] + newblock + txt[m.end():]\n open(f,'w').write(newtxt)\n... ``` **output** ``` exit_code: 0 fixed system/controlDict fixed system/fvSchemes fixed system/fvSolution fixed system/decomposeParDict fixed constant/transportProperties fixed constant/turbulenceProperties fixed 0.orig/U fixed 0.orig/p fixed 0.orig/k fixed 0.orig/epsilon fixed 0.orig/nut fixed 0.orig/include/ABLConditions fixed 0.orig/include/initialConditions /*--------------------------------*- C++ -*----------------------------------*\ FoamFile { version 2.0; format ascii; class dictionary; object controlDict; } ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nfoamDictionary system/controlDict -entry application 2>&1 | tail -10" } ``` **output** ``` exit_code: 0 --> FOAM FATAL IO ERROR: (openfoam-2512) Cannot find entry application file: system/controlDict at line 50. From int main(int, char**) in file foamDictionary.C at line 588. FOAM exiting ``` ### tool: bash `cat -n /work/20260528-090054-8b1e/case/system/controlDict` exit 0 **input** ``` { "cmd": "cat -n /work/20260528-090054-8b1e/case/system/controlDict" } ``` **output** ``` exit_code: 0 [took 12s] 1 /*--------------------------------*- C++ -*----------------------------------*\ 2 FoamFile 3 { 4 version 2.0; 5 format ascii; 6 class dictionary; 7 object controlDict; 8 } 9 10 11 libs (atmosphericModels); 12 13 application simpleFoam; 14 15 startFrom latestTime; 16 startTime 0; 17 stopAt endTime; 18 endTime 1000; 19 20 deltaT 1; 21 22 writeControl timeStep; 23 writeInterval 100; 24 25 purgeWrite 2; 26 27 writeFormat binary; 28 writePrecision 8; 29 writeCompression off; 30 31 timeFormat general; 32 timePrecision 6; 33 34 runTimeModifiable yes; 35 36 functions 37 { 38 forceCoeffs 39 { 40 type forces; 41 libs (forces); 42 patches (building); 43 writeControl timeStep; 44 writeInterval 50; 45 rho rhoInf; 46 rhoInf 1.2; 47 CofR (0 0 30); 48 } 49 } ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ngrep -rl '^/\\*--------------------------------\\*- C++ -\\*----------------------------------\\*\\\\$' . | while read f; do\n sed -i '1s#.*#// -*- C++ -*-#' \"$f\"\ndone\nhead -3 system/controlDict\nfoamDictionary system/controlDict -entry application" } ``` **output** ``` exit_code: 0 // -*- C++ -*- FoamFile { application simpleFoam; ``` ### agent Fixed the unterminated comment bug across all files. Now let's build the mesh. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ngrep -rl '^/\\*--------------------------------\\*- C++ -\\*----------------------------------\\*\\\\$' . \nrm -rf constant/polyMesh log.blockMesh\nblockMesh > log.blockMesh 2>&1; tail -30 log.blockMesh" } ``` **output** ``` exit_code: 0 ./log.blockMesh Creating patches Creating cells Creating points with scale (1 1 1) Block 0 cell size : i : 14.83871 .. 14.83871 j : 15 .. 15 k : 15 .. 15 No patch pairs to merge Writing polyMesh with 0 cellZones ---------------- Mesh Information ---------------- boundingBox: (-300 -300 0) (620 300 360) nPoints: 64575 nCells: 59520 nFaces: 183488 nInternalFaces: 173632 ---------------- Patches ---------------- patch 0 (start: 173632 size: 960) name: inlet patch 1 (start: 174592 size: 960) name: outlet patch 2 (start: 175552 size: 2976) name: sides patch 3 (start: 178528 size: 2480) name: ground patch 4 (start: 181008 size: 2480) name: top End ``` ### agent blockMesh worked. Now decompose and run snappyHexMesh in parallel. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ncp -r 0.orig 0\ndecomposePar -force > log.decomposePar 2>&1\ntail -20 log.decomposePar" } ``` **output** ``` exit_code: 0 [took 16s] Number of faces shared with processor 1 = 471 Number of faces shared with processor 2 = 885 Number of processor patches = 3 Number of processor faces = 1377 Number of boundary faces = 2431 Number of processor faces = 2733 Max number of cells = 14907 (0.18145161% above average 14880) Max number of processor patches = 3 (0% above average 3) Max number of faces between processors = 1416 (3.622393% above average 1366.5) Time = 0 Processor 0: field transfer Processor 1: field transfer Processor 2: field transfer Processor 3: field transfer End ``` ### tool: job_start `cd /work/20260528-090054-8b1e/case && mpirun -np 4 snappyHexMesh -parallel -ov...` **input** ``` { "name": "snappy", "cmd": "cd /work/20260528-090054-8b1e/case && mpirun -np 4 snappyHexMesh -parallel -overwrite > log.snappyHexMesh 2>&1" } ``` **output** ``` started job 2fe7a05f-4e9f-4c12-80a5-0ede9033230d (snappy) ``` ### tool: job_check `job_id=2fe7a05f-4e9f-4c12-80a5-0ede9033230d wait_s=120` **input** ``` { "job_id": "2fe7a05f-4e9f-4c12-80a5-0ede9033230d", "wait_s": 120 } ``` **output** ``` job 2fe7a05f-4e9f-4c12-80a5-0ede9033230d name=snappy status=exited exit_code=1 end_reason=completed log_size=0 ran_for=6s log: bytes 0–0, eof=True ``` ### tool: bash `cd /work/20260528-090054-8b1e/case; ls -la log.snappyHexMesh; cat log.snappyHe...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case; ls -la log.snappyHexMesh; cat log.snappyHexMesh 2>&1 | tail -50\nls processor0 2>/dev/null" } ``` **output** ``` exit_code: 0 [took 52s] -rw-r--r-- 1 root root 887 Aug 29 01:09 log.snappyHexMesh -------------------------------------------------------------------------- mpirun has detected an attempt to run as root. Running as root is *strongly* discouraged as any mistake (e.g., in defining TMPDIR) or bug can result in catastrophic damage to the OS file system, leaving your system in an unusable state. We strongly suggest that you run mpirun as a non-root user. You can override this protection by adding the --allow-run-as-root option to the cmd line or by setting two environment variables in the following way: the variable OMPI_ALLOW_RUN_AS_ROOT=1 to indicate the desire to override this protection, and OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1 to confirm the choice and add one more layer of certainty that you want to do so. We reiterate our advice against doing so - please proceed at your own risk. -------------------------------------------------------------------------- 0 constant ``` ### tool: bash `env | grep -i OMPI; env | grep -i PMIX` exit 1 **input** ``` { "cmd": "env | grep -i OMPI; env | grep -i PMIX" } ``` **output** ``` exit_code: 1 WM_COMPILER=Gcc OMPI_MCA_btl_vader_single_copy_mechanism=none WM_COMPILE_OPTION=Opt OMPI_MCA_btl_base_warn_component_unused=0 WM_COMPILER_TYPE=system WM_COMPILER_LIB_ARCH=64 ``` ### agent Env vars for allow-run-as-root missing in this session's shell. I'll just pass the flag explicitly. ### tool: job_start `cd /work/20260528-090054-8b1e/case && mpirun --allow-run-as-root -np 4 snappyH...` **input** ``` { "name": "snappy", "cmd": "cd /work/20260528-090054-8b1e/case && mpirun --allow-run-as-root -np 4 snappyHexMesh -parallel -overwrite > log.snappyHexMesh 2>&1" } ``` **output** ``` started job 9f60aba7-001e-4068-8b1a-12c594233f88 (snappy) ``` ### tool: job_check `job_id=9f60aba7-001e-4068-8b1a-12c594233f88 wait_s=180` **input** ``` { "job_id": "9f60aba7-001e-4068-8b1a-12c594233f88", "wait_s": 180 } ``` **output** ``` job 9f60aba7-001e-4068-8b1a-12c594233f88 name=snappy status=exited exit_code=0 end_reason=completed log_size=0 ran_for=6s log: bytes 0–0, eof=True ``` ### tool: bash `cd /work/20260528-090054-8b1e/case; wc -l log.snappyHexMesh; tail -80 log.snap...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case; wc -l log.snappyHexMesh; tail -80 log.snappyHexMesh" } ``` **output** ``` exit_code: 0 891 log.snappyHexMesh Successfully moved mesh Moved mesh in = 0.06 s Repatching faces according to nearest surface ... Repatched 0 faces in = 0 s Edge intersection testing: Number of edges : 248285 Number of edges to retest : 65799 Number of intersected edges : 1336 Merging 24 sets of faces. Edge intersection testing: Number of edges : 248257 Number of edges to retest : 138 Number of intersected edges : 1308 Undo iteration 0 ---------------- Checking faces in error : non-orthogonality > 65 degrees : 0 faces with face pyramid volume < 1e-13 : 0 faces with face-decomposition tet quality < 1e-30 : 0 faces with concavity > 80 degrees : 0 faces with skewness > 4 (internal) or 20 (boundary) : 0 faces with interpolation weights (0..1) < 0.05 : 0 faces with volume ratio of neighbour cells < 0.01 : 0 faces with face twist < 0.05 : 0 faces on cells with determinant < 0.001 : 0 Merging all points on surface that - are used by only two boundary faces and - make an angle with a cosine of more than 0.8660254. Removing 24 straight edge points ... Edge intersection testing: Number of edges : 248257 Number of edges to retest : 138 Number o ``` ### agent Snappy completed cleanly: 79,610 cells, no errors, no undone refinements. Let's reconstruct the mesh and run checkMesh. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nreconstructParMesh -constant > log.reconstructParMesh 2>&1\ntail -20 log.reconstructParMesh" } ``` **output** ``` exit_code: 0 [took 34s] boundaryProcAddressing Processor 2 Read processor mesh: "case/processor2" Writing addressing : "case/processor2/constant/polyMesh" pointProcAddressing faceProcAddressing cellProcAddressing boundaryProcAddressing Processor 3 Read processor mesh: "case/processor3" Writing addressing : "case/processor3/constant/polyMesh" pointProcAddressing faceProcAddressing cellProcAddressing boundaryProcAddressing End ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ncheckMesh > log.checkMesh 2>&1\ntail -80 log.checkMesh" } ``` **output** ``` exit_code: 0 Check mesh... Time = 0 Mesh stats points: 89278 faces: 248257 internal faces: 235341 cells: 79610 faces per cell: 6.0745886 boundary patches: 6 point zones: 1 face zones: 0 cell zones: 0 Overall number of cells of each type: hexahedra: 77288 prisms: 0 wedges: 0 pyramids: 0 tet wedges: 0 tetrahedra: 0 polyhedra: 2322 Breakdown of polyhedra by number of faces: faces number of cells 6 502 7 20 8 4 9 1626 12 166 15 4 Checking topology... Boundary definition OK. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. Number of regions: 1 (OK). Checking patch topology for multiply connected surfaces... Patch Faces Points Surface topology inlet 960 1025 ok (non-closed singly connected) outlet 960 1025 ok (non-closed singly connected) sides 2976 3150 ok (non-closed singly connected) ground 4232 4437 ok (non-closed singly connected) top 2480 2583 ok (non-closed singly connected) building ``` ### agent Mesh is clean — checkMesh reports "Mesh OK" with all checks passing, good non-orthogonality (max 31°) and skewness (max 0.69). Now render the mesh before solving. ### tool: bash `cat /work/.toolbox/render.py | sed -n '1,115p'` exit 0 **input** ``` { "cmd": "cat /work/.toolbox/render.py | sed -n '1,115p'" } ``` **output** ``` exit_code: 0 #!/usr/bin/env python3 """A few fixed pyvista scenes: mesh cuts and field slices, saved as PNGs. Headless via OSMesa. Fixed cameras so two runs of the same case are a visual diff rather than two unrelated pictures. python3 render.py /work/case # latest time, all default scenes python3 render.py /work/case --fields U p --normal z --time 500 python3 render.py /work/case --scene mesh --out /work/case/renders """ from __future__ import annotations import argparse from pathlib import Path import numpy as np import pyvista as pv pv.OFF_SCREEN = True NORMALS = {"x": (1, 0, 0), "y": (0, 1, 0), "z": (0, 0, 1)} def open_case(case: Path, time: float | None): foam = case / f"{case.name}.foam" if not foam.exists(): foam.write_text("") reader = pv.OpenFOAMReader(str(foam)) times = list(reader.time_values) chosen = times[-1] if times else 0.0 if time is not None and times: chosen = min(times, key=lambda t: abs(t - time)) reader.set_active_time_value(chosen) reader.cell_to_point_creation = True return reader.read(), chosen, times def internal_mesh(block): """The internalMesh block, whatever nesting this case produced.""" if isinstance(block, pv.MultiBlock): if "internalMesh" in (block.keys() or []): return block["internalMesh"] for item in block: ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 /work/.toolbox/render.py . --scene mesh --normal y --out renders\npython3 /work/.toolbox/render.py . --scene mesh --normal z --out renders\nls renders" } ``` **output** ``` exit_code: 0 2026-08-29 01:12:18.884 ( 0.234s) [ 2AD589CB0540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15f5290): Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity ERROR:root:Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity 2026-08-29 01:12:18.885 ( 0.236s) [ 2AD589CB0540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15f5290): Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon ERROR:root:Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon 2026-08-29 01:12:18.886 ( 0.236s) [ 2AD589CB0540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15f5290): Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:12:18.898 ( 0.249s) [ 2AD589CB0540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15f5290): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for unifor ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_y.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_y.png" } ``` **output** ``` [image/png, 149553 bytes] /work/20260528-090054-8b1e/case/renders/mesh_y.png — 1100x800 image/png, 149552 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_z.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_z.png" } ``` **output** ``` [image/png, 115914 bytes] /work/20260528-090054-8b1e/case/renders/mesh_z.png — 1100x800 image/png, 115913 bytes ``` ### tool: write_file `/work/20260528-090054-8b1e/case/render_custom.py` **input** ``` { "path": "/work/20260528-090054-8b1e/case/render_custom.py", "content": "import pyvista as pv\nimport numpy as np\nfrom pathlib import Path\n\npv.OFF_SCREEN = True\ncase = Path('.')\nfoam = case / f\"{case.resolve().name}.foam\"\nfoam.write_text(\"\")\nreader = pv.OpenFOAMReader(str(foam))\nreader.cell_to_point_creation = False\nmesh = reader.read()\ninternal = mesh[\"internalMesh\"] if \"internalMesh\" in mesh.keys() else mesh[0]\n\nout = Path(\"renders\")\nout.mkdir(exist_ok=True)\n\n# y=0 vertical slice zoomed near building, full domain height\ncut = internal.slice(normal=(0,1,0), origin=(0,0,0))\np = pv.Plotter(off_screen=True, window_size=(1400,700))\np.add_mesh(cut, color=\"white\", show_edges=True, edge_color=\"black\", line_width=0.3)\np.view_vector((0,1,0))\np.camera.parallel_projection = True\np.reset_camera(bounds=(-150,250,-1,1,0,150))\np.add_text(\"mesh: y=0 vertical sl... ``` **output** ``` wrote 1732 bytes to /work/20260528-090054-8b1e/case/render_custom.py ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 render_custom.py` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 render_custom.py" } ``` **output** ``` exit_code: 0 2026-08-29 01:13:03.246 ( 0.228s) [ 2B471AE7B540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15b0120): Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity ERROR:root:Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity 2026-08-29 01:13:03.248 ( 0.230s) [ 2B471AE7B540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15b0120): Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon ERROR:root:Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon 2026-08-29 01:13:03.248 ( 0.230s) [ 2B471AE7B540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15b0120): Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:13:03.250 ( 0.232s) [ 2B471AE7B540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15b0120): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for unifor ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png" } ``` **output** ``` [image/png, 216732 bytes] /work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png — 1400x700 image/png, 216730 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png" } ``` **output** ``` [image/png, 206682 bytes] /work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png — 1400x900 image/png, 206680 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_y_full.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_y_full.png" } ``` **output** ``` [image/png, 141957 bytes] /work/20260528-090054-8b1e/case/renders/mesh_y_full.png — 1400x700 image/png, 141956 bytes ``` ### tool: write_file `/work/20260528-090054-8b1e/case/render_custom.py` **input** ``` { "path": "/work/20260528-090054-8b1e/case/render_custom.py", "content": "import pyvista as pv\nimport numpy as np\nfrom pathlib import Path\n\npv.OFF_SCREEN = True\ncase = Path('.')\nfoam = case / f\"{case.resolve().name}.foam\"\nfoam.write_text(\"\")\nreader = pv.OpenFOAMReader(str(foam))\nreader.cell_to_point_creation = False\nmesh = reader.read()\ninternal = mesh[\"internalMesh\"] if \"internalMesh\" in mesh.keys() else mesh[0]\n\nout = Path(\"renders\")\nout.mkdir(exist_ok=True)\n\n# y=0.2 vertical slice (offset off the cell-face plane) zoomed near building\ncut = internal.slice(normal=(0,1,0), origin=(0,0.2,0))\np = pv.Plotter(off_screen=True, window_size=(1400,700))\np.add_mesh(cut, color=\"white\", show_edges=True, edge_color=\"black\", line_width=0.3)\np.view_vector((0,1,0))\np.camera.parallel_projection = True\np.reset_camera(bounds=(-150,250,0,0.5,0,150))\np.add_text(\"mes... ``` **output** ``` wrote 1752 bytes to /work/20260528-090054-8b1e/case/render_custom.py ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 render_custom.py 2>&1 | tail -5` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 render_custom.py 2>&1 | tail -5" } ``` **output** ``` exit_code: 0 ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:14:48.401 ( 0.230s) [ 2AE8F1A7B540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x15ab060): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure 2026-08-29 01:14:49.056 ( 0.886s) [ 2AE8F1A7B540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x59fe070): Resetting view-up since view plane normal is parallel done ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_y_full.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_y_full.png" } ``` **output** ``` [image/png, 91932 bytes] /work/20260528-090054-8b1e/case/renders/mesh_y_full.png — 1400x700 image/png, 91930 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png" } ``` **output** ``` [image/png, 127314 bytes] /work/20260528-090054-8b1e/case/renders/mesh_y_zoom.png — 1400x700 image/png, 127312 bytes ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport pyvista as pv\npv.OFF_SCREEN=True\nfrom pathlib import Path\nfoam = Path(\"case.foam\")\nfoam.write_text(\"\")\nreader = pv.OpenFOAMReader(str(foam))\nreader.cell_to_point_creation=False\nmesh = reader.read()\nprint(mesh.keys())\npatches = mesh[\"boundary\"] if \"boundary\" in mesh.keys() else None\nprint(patches.keys() if patches else None)\nEOF\n" } ``` **output** ``` exit_code: 0 2026-08-29 01:16:01.674 ( 0.227s) [ 2AAD3CCBA540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1595040): Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity ERROR:root:Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity 2026-08-29 01:16:01.675 ( 0.229s) [ 2AAD3CCBA540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1595040): Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon ERROR:root:Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon 2026-08-29 01:16:01.676 ( 0.230s) [ 2AAD3CCBA540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1595040): Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:16:01.678 ( 0.231s) [ 2AAD3CCBA540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1595040): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for unifor ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport pyvista as pv\npv.OFF_SCREEN=True\nfrom pathlib import Path\nfoam = Path(\"case.foam\")\nreader = pv.OpenFOAMReader(str(foam))\nreader.cell_to_point_creation=False\nmesh = reader.read()\nbuilding = mesh[\"boundary\"][\"building\"]\nground = mesh[\"boundary\"][\"ground\"]\np = pv.Plotter(off_screen=True, window_size=(1200,1000))\np.add_mesh(building, color=\"salmon\", show_edges=True)\np.add_mesh(ground, color=\"lightgray\", opacity=0.3)\np.view_isometric()\np.reset_camera(bounds=(-40,40,-40,40,0,80))\np.add_text(\"building patch + ground, isometric\", font_size=10)\np.screenshot(\"renders/building_patch_iso.png\")\np.close()\nEOF\n" } ``` **output** ``` exit_code: 0 2026-08-29 01:16:10.021 ( 0.226s) [ 2B19905BD540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1597c30): Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity ERROR:root:Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity 2026-08-29 01:16:10.023 ( 0.227s) [ 2B19905BD540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1597c30): Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon ERROR:root:Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon 2026-08-29 01:16:10.023 ( 0.228s) [ 2B19905BD540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1597c30): Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:16:10.025 ( 0.229s) [ 2B19905BD540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x1597c30): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for unifor ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/building_patch_iso.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/building_patch_iso.png" } ``` **output** ``` [image/png, 17910 bytes] /work/20260528-090054-8b1e/case/renders/building_patch_iso.png — 1200x1000 image/png, 17909 bytes ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport pyvista as pv\npv.OFF_SCREEN=True\nfrom pathlib import Path\nfoam = Path(\"case.foam\")\nreader = pv.OpenFOAMReader(str(foam))\nreader.cell_to_point_creation=False\nmesh = reader.read()\nbuilding = mesh[\"boundary\"][\"building\"]\np = pv.Plotter(off_screen=True, window_size=(1200,1000))\np.add_mesh(building, color=\"salmon\", show_edges=True)\np.camera_position = [(60,-60,90),(0,0,30),(0,0,1)]\np.add_text(\"building patch close-up\", font_size=10)\np.screenshot(\"renders/building_patch_close.png\")\np.close()\nprint(building.bounds)\nEOF\n" } ``` **output** ``` exit_code: 0 2026-08-29 01:16:34.608 ( 0.233s) [ 2B02882F1540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x159aab0): Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity ERROR:root:Error reading line 15 of ./0/U: Expected number, string or ( for uniform entry, found flowVelocity 2026-08-29 01:16:34.610 ( 0.234s) [ 2B02882F1540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x159aab0): Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon ERROR:root:Error reading line 15 of ./0/epsilon: Expected number, string or ( for uniform entry, found turbulentEpsilon 2026-08-29 01:16:34.610 ( 0.235s) [ 2B02882F1540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x159aab0): Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE ERROR:root:Error reading line 15 of ./0/k: Expected number, string or ( for uniform entry, found turbulentKE 2026-08-29 01:16:34.612 ( 0.237s) [ 2B02882F1540] vtkOpenFOAMReader.cxx:8730 ERR| vtkOpenFOAMReaderPrivate (0x159aab0): Error reading line 15 of ./0/p: Expected number, string or ( for uniform entry, found pressure ERROR:root:Error reading line 15 of ./0/p: Expected number, string or ( for unifor ``` ### agent Bounds are correct (16×24×60). Good, that confirms the building shape and location is right. ### tool: read_file `/work/20260528-090054-8b1e/case/renders/building_patch_close.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/building_patch_close.png" } ``` **output** ``` [image/png, 315297 bytes] /work/20260528-090054-8b1e/case/renders/building_patch_close.png — 1200x1000 image/png, 315297 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png" } ``` **output** ``` [image/png, 206682 bytes] /work/20260528-090054-8b1e/case/renders/mesh_z2_zoom.png — 1400x900 image/png, 206680 bytes ``` ### agent This pedestrian-level slice confirms a clean, well-graded mesh: correct nested refinement boxes (level-1 → level-2 → level-3 near the building surface), rectangular building footprint at the right position, no defects. Good to proceed. Now let's run the steady simpleFoam solve in parallel. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nrm -rf 0\ncp -r 0.orig 0\nls processor0\n# re-decompose fields onto the parallel mesh already there (processor dirs have mesh from snappy)\ndecomposePar -force -fields > log.decomposePar2 2>&1\ntail -20 log.decomposePar2" } ``` **output** ``` exit_code: 0 0 constant fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Decomposing mesh Create mesh Time = 0 Processor 0: field transfer Processor 1: field transfer Processor 2: field transfer Processor 3: field transfer End ``` ### tool: job_start `cd /work/20260528-090054-8b1e/case && mpirun --allow-run-as-root -np 4 simpleF...` **input** ``` { "name": "simpleFoam", "cmd": "cd /work/20260528-090054-8b1e/case && mpirun --allow-run-as-root -np 4 simpleFoam -parallel > log.simpleFoam 2>&1" } ``` **output** ``` started job 03d8e207-2eb1-475b-80ea-48e710b062aa (simpleFoam) ``` ### tool: job_check `job_id=03d8e207-2eb1-475b-80ea-48e710b062aa wait_s=120` **input** ``` { "job_id": "03d8e207-2eb1-475b-80ea-48e710b062aa", "wait_s": 120 } ``` **output** ``` job 03d8e207-2eb1-475b-80ea-48e710b062aa name=simpleFoam status=exited exit_code=0 end_reason=completed log_size=0 ran_for=25s [waited 20s] log: bytes 0–0, eof=True ``` ### tool: bash `cd /work/20260528-090054-8b1e/case; wc -l log.simpleFoam; tail -60 log.simpleF...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case; wc -l log.simpleFoam; tail -60 log.simpleFoam" } ``` **output** ``` exit_code: 0 5511 log.simpleFoam smoothSolver: Solving for k, Initial residual = 3.5532636e-06, Final residual = 3.1603098e-07, No Iterations 3 ExecutionTime = 13.36 s ClockTime = 14 s forces forceCoeffs write: Sum of forces Total : (225846.7 -0.0048678678 35954.306) Pressure : (223871.45 -0.0049491922 36167.066) Viscous : (1975.2466 8.1324392e-05 -212.76057) Sum of moments Total : (0.060883784 1108410.3 -0.068788978) Pressure : (0.059459887 1088265.9 -0.069750322) Viscous : (0.0014238967 20144.422 0.00096134416) Time = 257 smoothSolver: Solving for Ux, Initial residual = 1.4914443e-07, Final residual = 9.8507049e-09, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 3.9861013e-06, Final residual = 3.2188984e-07, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 1.0135726e-05, Final residual = 7.8751568e-07, No Iterations 3 GAMG: Solving for p, Initial residual = 3.4854453e-06, Final residual = 3.364009e-07, No Iterations 1 GAMG: Solving for p, Initial residual = 3.396584e-07, Final residual = 5.5819881e-08, No Iterations 2 time step continuity errors : sum local = 2.0450758e-11, global = -1.254947e-11, cumulative = -8.0344993e-06 smoothSolver: Solving for epsilon, Initial residual = 1.7510829e-08, Final residual = 7.2272247e-09, No Iterations 1 smoothSolver: Solving for k, ``` ### agent Converged nicely: SIMPLE converged in 258 iterations, ~13 s execution time. Let's reconstruct and check residual behavior + convergence, then render fields. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nreconstructPar -latestTime > log.reconstructPar 2>&1\ntail -20 log.reconstructPar\nls" } ``` **output** ``` exit_code: 0 Reconstructing volVectorFields U Reconstructing surfaceScalarFields phi Reconstructing point fields No point fields No lagrangian fields No finite-area fields End 0 0.orig 258 case.foam constant log.blockMesh log.checkMesh log.decomposePar log.decomposePar2 log.reconstructPar log.reconstructParMesh log.simpleFoam log.snappyHexMesh postProcessing processor0 processor1 processor2 processor3 render_custom.py renders renders_geom system ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nls 258/\ncat log.reconstructPar" } ``` **output** ``` exit_code: 0 U epsilon k nut p phi uniform /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2512 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : _87ed40d2-20251219 OPENFOAM=2512 version=2512 Arch : "LSB;label=32;scalar=64" Exec : reconstructPar -latestTime Date : Aug 29 2026 Time : 01:18:24 Host : modal PID : 32441 I/O : uncollated Case : /work/20260528-090054-8b1e/case nProcs : 1 trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE). memory pool : not available fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20) allowSystemOperations : Allowing user-supplied system call operations // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // Create time Reconstructing fields region=region0 Time = 258 Reconstructing FV fields Reconstructing volScalarFields epsilon ``` ### agent Good, all fields reconstructed. Now let's check residuals plot with log_digest, and render field results at pedestrian height (2m). ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 /work/.toolbox/log_digest.py log.simpleFoam --out renders 2>&1 | tail -30" } ``` **output** ``` exit_code: 0 # log.simpleFoam time steps parsed: 258 (last Time = 258) ExecutionTime at last write: 13.44 s ## last iteration field initial final iters Ux 1.4157e-07 9.3487e-09 3 Uy 3.8403e-06 3.1007e-07 3 Uz 9.6208e-06 7.4743e-07 3 epsilon 1.6967e-08 7.0074e-09 1 k 3.2143e-06 2.8587e-07 3 p 3.2308e-07 5.2977e-08 2 ## continuity (most recent) sum local 1.9409e-11 global -1.2042e-11 cumulative -8.0345e-06 residual plot: renders ``` ### tool: bash `ls /work/20260528-090054-8b1e/case/renders` exit 0 **input** ``` { "cmd": "ls /work/20260528-090054-8b1e/case/renders" } ``` **output** ``` exit_code: 0 building_patch_close.png building_patch_iso.png mesh_y.png mesh_y_full.png mesh_y_zoom.png mesh_z.png mesh_z2_zoom.png ``` ### tool: bash `find /work/20260528-090054-8b1e -iname "*residual*"` exit 0 **input** ``` { "cmd": "find /work/20260528-090054-8b1e -iname \"*residual*\"" } ``` **output** ``` exit_code: 0 ``` ### tool: bash `python3 /work/.toolbox/log_digest.py --help 2>&1 | head -30` exit 0 **input** ``` { "cmd": "python3 /work/.toolbox/log_digest.py --help 2>&1 | head -30" } ``` **output** ``` exit_code: 0 usage: log_digest.py [-h] [-o OUT] [--csv CSV] log Solver log -> residual plot, last-iteration table, continuity summary. Reads a log of any size in one pass without holding it in memory. Reports numbers and draws them; it does not say whether anything is converged — that reading is yours. python3 log_digest.py log.simpleFoam [-o residuals.png] [--csv residuals.csv] positional arguments: log options: -h, --help show this help message and exit -o OUT, --out OUT residual plot path --csv CSV also write the residual series ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 /work/.toolbox/log_digest.py log.simpleFoam -o renders/residuals.png 2>&1 | tail -10\nls renders/residuals.png" } ``` **output** ``` exit_code: 0 Uy 3.8403e-06 3.1007e-07 3 Uz 9.6208e-06 7.4743e-07 3 epsilon 1.6967e-08 7.0074e-09 1 k 3.2143e-06 2.8587e-07 3 p 3.2308e-07 5.2977e-08 2 ## continuity (most recent) sum local 1.9409e-11 global -1.2042e-11 cumulative -8.0345e-06 residual plot: renders/residuals.png renders/residuals.png ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/residuals.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/residuals.png" } ``` **output** ``` [image/png, 164649 bytes] /work/20260528-090054-8b1e/case/renders/residuals.png — 1080x600 image/png, 164649 bytes ``` ### agent Nicely converged — all residuals down to 1e-5 to 1e-7. Now let's render the pedestrian-level wind speed field and a vertical slice through the wake. ### tool: write_file `/work/20260528-090054-8b1e/case/render_fields.py` **input** ``` { "path": "/work/20260528-090054-8b1e/case/render_fields.py", "content": "import pyvista as pv\nimport numpy as np\nfrom pathlib import Path\n\npv.OFF_SCREEN = True\ncase = Path('.')\nfoam = case / f\"{case.resolve().name}.foam\"\nfoam.write_text(\"\")\nreader = pv.OpenFOAMReader(str(foam))\ntimes = list(reader.time_values)\nreader.set_active_time_value(times[-1])\nreader.cell_to_point_creation = False\nmesh = reader.read()\ninternal = mesh[\"internalMesh\"]\n\nUref = 10.0 # free-stream reference used for normalisation (approaching wind speed)\n\nout = Path(\"renders\")\nout.mkdir(exist_ok=True)\n\n# --- pedestrian-level (z=2 m) speed ratio slice ---\ncut = internal.slice(normal=(0,0,1), origin=(0,0,2.0))\nU = cut.cell_data[\"U\"]\nspeed = np.linalg.norm(U, axis=1)\ncut.cell_data[\"speed\"] = speed\ncut.cell_data[\"speedRatio\"] = speed / Uref\n\np = pv.Plotter(off_screen=True, wind... ``` **output** ``` wrote 2352 bytes to /work/20260528-090054-8b1e/case/render_fields.py ``` ### tool: bash `tail -3 /work/20260528-090054-8b1e/case/render_fields.py` exit 0 **input** ``` { "cmd": "tail -3 /work/20260528-090054-8b1e/case/render_fields.py" } ``` **output** ``` exit_code: 0 sub_speed = speed[mask] print("max speed near building at z=2m:", sub_speed[idx], "at (x,y)=", sub_pts[idx][:2]) EOF ``` ### tool: bash `sed -i '$ d' /work/20260528-090054-8b1e/case/render_fields.py` exit 0 **input** ``` { "cmd": "sed -i '$ d' /work/20260528-090054-8b1e/case/render_fields.py\ntail -3 /work/20260528-090054-8b1e/case/render_fields.py" } ``` **output** ``` exit_code: 0 sub_pts = pts[mask] sub_speed = speed[mask] print("max speed near building at z=2m:", sub_speed[idx], "at (x,y)=", sub_pts[idx][:2]) ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 render_fields.py 2>&1 | tail -20` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 render_fields.py 2>&1 | tail -20" } ``` **output** ``` exit_code: 0 2026-08-29 01:20:06.010 ( 0.761s) [ 2B04672C7540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2971290): Resetting view-up since view plane normal is parallel ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 render_fields.py > /tmp/out.txt ...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 render_fields.py > /tmp/out.txt 2>&1; cat /tmp/out.txt" } ``` **output** ``` exit_code: 0 2026-08-29 01:20:14.895 ( 0.758s) [ 2AE81B352540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2974290): Resetting view-up since view plane normal is parallel ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py\necho \"exit: $?\"" } ``` **output** ``` exit_code: 0 [took 11s] 2026-08-29 01:20:32.893 ( 0.767s) [ 2B18E93FD540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x29729f0): Resetting view-up since view plane normal is parallel exit: 0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -c "print('hello world')"` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -c \"print('hello world')\"" } ``` **output** ``` exit_code: 0 hello world ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py > outfile.lo...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py > outfile.log 2>&1; echo DONE; wc -l outfile.log; cat outfile.log" } ``` **output** ``` exit_code: 0 DONE 1 outfile.log 2026-08-29 01:20:54.212 ( 0.753s) [ 2B4CF3FC4540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2972670): Resetting view-up since view plane normal is parallel ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u -c "` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u -c \"\nimport sys\nprint('start', flush=True)\nimport pyvista as pv\nprint('pv imported', flush=True)\npv.OFF_SCREEN=True\nfrom pathlib import Path\nfoam = Path('case.foam')\nreader = pv.OpenFOAMReader(str(foam))\nprint('times', list(reader.time_values), flush=True)\nreader.set_active_time_value(list(reader.time_values)[-1])\nreader.cell_to_point_creation=False\nmesh = reader.read()\nprint('read ok', mesh.keys(), flush=True)\ninternal = mesh['internalMesh']\nprint('internal', internal, flush=True)\nprint('has U', 'U' in internal.cell_data.keys(), flush=True)\n\"\n" } ``` **output** ``` exit_code: 0 start pv imported times [0.0, 258.0] read ok ['internalMesh', 'boundary'] internal UnstructuredGrid (0x2b9d65e57580) N Cells: 79610 N Points: 89278 X Bounds: -3.000e+02, 6.200e+02 Y Bounds: -3.000e+02, 3.000e+02 Z Bounds: 0.000e+00, 3.600e+02 N Arrays: 5 has U True ``` ### tool: bash `python3 -m py_compile /work/20260528-090054-8b1e/case/render_fields.py && echo...` exit 0 **input** ``` { "cmd": "python3 -m py_compile /work/20260528-090054-8b1e/case/render_fields.py && echo COMPILE_OK\ncat -A /work/20260528-090054-8b1e/case/render_fields.py | tail -5" } ``` **output** ``` exit_code: 0 COMPILE_OK mask = (np.abs(pts[:,0])<60) & (np.abs(pts[:,1])<60)$ idx = np.argmax(speed[mask])$ sub_pts = pts[mask]$ sub_speed = speed[mask]$ print("max speed near building at z=2m:", sub_speed[idx], "at (x,y)=", sub_pts[idx][:2])$ ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py 1> out.txt 2...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py 1> out.txt 2> err.txt; echo \"exit=$?\"; wc -l out.txt err.txt" } ``` **output** ``` exit_code: 0 exit=0 0 out.txt 1 err.txt 1 total ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u -c "` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u -c \"\nimport pyvista as pv, numpy as np\npv.OFF_SCREEN=True\nfrom pathlib import Path\nfoam = Path('case.foam')\nreader = pv.OpenFOAMReader(str(foam))\nreader.set_active_time_value(258.0)\nreader.cell_to_point_creation=False\nmesh=reader.read()\ninternal=mesh['internalMesh']\nprint('step1',flush=True)\ncut = internal.slice(normal=(0,0,1), origin=(0,0,2.0))\nprint('step2 sliced', cut.n_cells, flush=True)\nU = cut.cell_data['U']\nprint('step3', U.shape, flush=True)\nspeed=np.linalg.norm(U,axis=1)\ncut.cell_data['speed']=speed\ncut.cell_data['speedRatio']=speed/10.0\nprint('step4', flush=True)\np = pv.Plotter(off_screen=True, window_size=(1500,1000))\np.add_mesh(cut, scalars='speedRatio', cmap='turbo', clim=(0,2.0))\nprint('step5 added mesh',flush=True)\np.add_scalar_bar(title='U/Uref')\np.view_vector((0,0,1))\np.camera.parallel_... ``` **output** ``` exit_code: 0 step1 step2 sliced 4232 step3 (4232, 3) step4 step5 added mesh 2026-08-29 01:21:46.632 ( 0.757s) [ 2B4EED9EB540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x29619b0): Resetting view-up since view plane normal is parallel step6 camera step7 screenshot done DONE exit=0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u -c "` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u -c \"\nimport pyvista as pv\npv.OFF_SCREEN=True\nfrom pathlib import Path\ncase = Path('.')\nfoam = case / f'{case.resolve().name}.foam'\nprint('foam path', foam, flush=True)\nfoam.write_text('')\nreader = pv.OpenFOAMReader(str(foam))\ntimes = list(reader.time_values)\nprint('times', times, flush=True)\nreader.set_active_time_value(times[-1])\nprint('set active ok', flush=True)\nreader.cell_to_point_creation = False\nmesh = reader.read()\nprint('read ok', flush=True)\n\"\necho exit=$?" } ``` **output** ``` exit_code: 0 foam path case.foam times [0.0, 258.0] set active ok read ok exit=0 ``` ### tool: bash `head -c 200 /work/20260528-090054-8b1e/case/render_fields.py | xxd | head -20` exit 0 **input** ``` { "cmd": "head -c 200 /work/20260528-090054-8b1e/case/render_fields.py | xxd | head -20" } ``` **output** ``` exit_code: 0 bash: line 4: xxd: command not found ``` ### tool: bash `head -c 200 /work/20260528-090054-8b1e/case/render_fields.py | od -c | head -2...` exit 0 **input** ``` { "cmd": "head -c 200 /work/20260528-090054-8b1e/case/render_fields.py | od -c | head -20\nwc -c /work/20260528-090054-8b1e/case/render_fields.py" } ``` **output** ``` exit_code: 0 0000000 i m p o r t p y v i s t a a 0000020 s p v \n i m p o r t n u m p 0000040 y a s n p \n f r o m p a t 0000060 h l i b i m p o r t P a t h 0000100 \n \n p v . O F F _ S C R E E N 0000120 = T r u e \n c a s e = P a 0000140 t h ( ' . ' ) \n f o a m = c 0000160 a s e / f " { c a s e . r e 0000200 s o l v e ( ) . n a m e } . f o 0000220 a m " \n f o a m . w r i t e _ t 0000240 e x t ( " " ) \n r e a d e r = 0000260 p v . O p e n F O A M R e a d 0000300 e r ( s t r ( f 0000310 2348 /work/20260528-090054-8b1e/case/render_fields.py ``` ### agent Nothing odd. Let's just run it directly again to see fresh behavior, maybe transient issue before. ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py; echo "exit=...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py; echo \"exit=$?\"" } ``` **output** ``` exit_code: 0 2026-08-29 01:22:25.668 ( 0.750s) [ 2B324CBD9540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2972500): Resetting view-up since view plane normal is parallel exit=0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -c \"\nwith open('render_fields.py') as f:\n content = f.read()\nnewcontent = 'print(\\\"FIRSTLINE\\\", flush=True)\\n' + content\nwith open('render_fields2.py','w') as f:\n f.write(newcontent)\n\"\npython3 -u render_fields2.py; echo exit=$?" } ``` **output** ``` exit_code: 0 [took 76s] FIRSTLINE 2026-08-29 01:23:48.779 ( 0.752s) [ 2B1B066C6540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x29753f0): Resetting view-up since view plane normal is parallel exit=0 ``` ### tool: bash `grep -n "print(" /work/20260528-090054-8b1e/case/render_fields.py` exit 0 **input** ``` { "cmd": "grep -n \"print(\" /work/20260528-090054-8b1e/case/render_fields.py" } ``` **output** ``` exit_code: 0 54:print("speed range at z=2m (m/s): min", speed.min(), "max", speed.max()) 55:print("speed ratio range at z=2m: min", (speed/Uref).min(), "max", (speed/Uref).max()) 63:print("max speed near building at z=2m:", sub_speed[idx], "at (x,y)=", sub_pts[idx][:2]) ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nsed -i 's/print(\\(.*\\))$/print(\\1, flush=True)/' render_fields.py\ntail -15 render_fields.py" } ``` **output** ``` exit_code: 0 p.reset_camera(bounds=(-100,220,0,0.5,0,140)) p.add_text("Vertical slice through building centreline: |U|", font_size=11) p.screenshot(str(out/"vertical_speed.png")) p.close() print("speed range at z=2m (m/s): min", speed.min(), "max", speed.max(), flush=True) print("speed ratio range at z=2m: min", (speed/Uref).min(), "max", (speed/Uref).max(), flush=True) # find location of max near-building speed at pedestrian level, restricted close to building pts = cut.cell_centers().points mask = (np.abs(pts[:,0])<60) & (np.abs(pts[:,1])<60) idx = np.argmax(speed[mask]) sub_pts = pts[mask] sub_speed = speed[mask] print("max speed near building at z=2m:", sub_speed[idx], "at (x,y)=", sub_pts[idx][:2], flush=True) ``` ### tool: bash `cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py; echo exit=$...` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case && python3 -u render_fields.py; echo exit=$?" } ``` **output** ``` exit_code: 0 2026-08-29 01:24:34.866 ( 0.757s) [ 2AF66D088540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2975270): Resetting view-up since view plane normal is parallel exit=0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -c \"\nimport subprocess\ncode = open('render_fields.py').read()\nwrapped = 'import traceback\\ntry:\\n' + '\\n'.join(' '+l for l in code.splitlines()) + '\\nexcept SystemExit as e:\\n open(\\\"crash.log\\\",\\\"w\\\").write(\\\"SystemExit: \\\"+str(e))\\nexcept BaseException:\\n open(\\\"crash.log\\\",\\\"w\\\").write(traceback.format_exc())\\nelse:\\n open(\\\"crash.log\\\",\\\"w\\\").write(\\\"NO EXCEPTION\\\")\\n'\nopen('render_fields_wrapped.py','w').write(wrapped)\n\"\npython3 -u render_fields_wrapped.py; echo exit=$?\ncat crash.log 2>&1" } ``` **output** ``` exit_code: 0 2026-08-29 01:24:45.792 ( 0.758s) [ 2B8149580540] vtkRenderer.cxx:1161 WARN| vtkOpenGLRenderer (0x2979750): Resetting view-up since view plane normal is parallel exit=0 NO EXCEPTION ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -u -c \"\nimport sys\nprint('before', flush=True)\nimport pyvista as pv\npv.OFF_SCREEN=True\np = pv.Plotter(off_screen=True)\np.add_mesh(pv.Sphere())\np.screenshot('test.png')\np.close()\nprint('after', flush=True)\nprint('after-stderr', file=sys.stderr, flush=True)\n\"\necho exit=$?" } ``` **output** ``` exit_code: 0 before after after-stderr exit=0 ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ncat render_fields.py | python3 -c \"\nimport sys\nlines = sys.stdin.read().splitlines()\nout = []\nout.append('import sys')\nfor l in lines:\n out.append(l)\n if l.strip() and not l.strip().startswith('#'):\n pass\nprint('\\n'.join(out))\n\" > /dev/null\n# Instead, manually add stderr trace after every top-level statement\npython3 - << 'PYEOF'\nsrc = open('render_fields.py').read().splitlines()\nout = [\"import sys as _sys\"]\nfor i,l in enumerate(src):\n out.append(l)\n if l and not l.startswith(' ') and not l.startswith('#') and l.strip():\n out.append(f'_sys.stderr.write(\"LINE {i} done: {l[:40]!r}\\\\n\"); _sys.stderr.flush()')\nopen('render_fields_trace.py','w').write('\\n'.join(out))\nPYEOF\npython3 -u render_fields_trace.py 2>&1 | tail -60" } ``` **output** ``` exit_code: 0 File "/__modal/volumes/vo-wvmvogItm3bZa84GOtUrFp/20260528-090054-8b1e/case/render_fields_trace.py", line 14 _sys.stderr.write("LINE 6 done: 'foam = case / f"{case.resolve().name}.fo'\n"); _sys.stderr.flush() ^ SyntaxError: unterminated string literal (detected at line 14) ``` ### tool: bash `cat -n /work/20260528-090054-8b1e/case/render_fields.py` exit 0 **input** ``` { "cmd": "cat -n /work/20260528-090054-8b1e/case/render_fields.py" } ``` **output** ``` exit_code: 0 1 import pyvista as pv 2 import numpy as np 3 from pathlib import Path 4 5 pv.OFF_SCREEN = True 6 case = Path('.') 7 foam = case / f"{case.resolve().name}.foam" 8 foam.write_text("") 9 reader = pv.OpenFOAMReader(str(foam)) 10 times = list(reader.time_values) 11 reader.set_active_time_value(times[-1]) 12 reader.cell_to_point_creation = False 13 mesh = reader.read() 14 internal = mesh["internalMesh"] 15 16 Uref = 10.0 # free-stream reference used for normalisation (approaching wind speed) 17 18 out = Path("renders") 19 out.mkdir(exist_ok=True) 20 21 # --- pedestrian-level (z=2 m) speed ratio slice --- 22 cut = internal.slice(normal=(0,0,1), origin=(0,0,2.0)) 23 U = cut.cell_data["U"] 24 speed = np.linalg.norm(U, axis=1) 25 cut.cell_data["speed"] = speed 26 cut.cell_data["speedRatio"] = speed / Uref 27 28 p = pv.Plotter(off_screen=True, window_size=(1500,1000)) 29 p.add_mesh(cut, scalars="speedRatio", cmap="turbo", clim=(0,2.0), show_edges=False) 30 p.add_scalar_bar(title="U/Uref @ z=2m", n_labels=6) 31 p.view_vector((0,0,1)) 32 p.camera.parallel_projection = True 33 p.reset_camera(bounds=(-80,140,-90,90,1.9,2.1)) 34 p.add_text("Pedestrian-level (z=2m) wind speed ratio U/Uref, Uref=10 m/s", font_size=11) 35 p.scree ``` ### tool: bash `ls -la /work/20260528-090054-8b1e/case/renders/` exit 0 **input** ``` { "cmd": "ls -la /work/20260528-090054-8b1e/case/renders/" } ``` **output** ``` exit_code: 0 total 1262 drwxr-xr-x 1 root root 181 Aug 29 01:21 . drwxr-xr-x 1 root root 400 Aug 29 01:25 .. -rw-r--r-- 1 root root 315297 Aug 29 01:16 building_patch_close.png -rw-r--r-- 1 root root 17909 Aug 29 01:16 building_patch_iso.png -rw-r--r-- 1 root root 149552 Aug 29 01:12 mesh_y.png -rw-r--r-- 1 root root 91930 Aug 29 01:14 mesh_y_full.png -rw-r--r-- 1 root root 127312 Aug 29 01:14 mesh_y_zoom.png -rw-r--r-- 1 root root 115913 Aug 29 01:12 mesh_z.png -rw-r--r-- 1 root root 206680 Aug 29 01:14 mesh_z2_zoom.png -rw-r--r-- 1 root root 43482 Aug 29 01:24 pedestrian_speedRatio.png -rw-r--r-- 1 root root 164649 Aug 29 01:19 residuals.png -rw-r--r-- 1 root root 32108 Aug 29 01:21 test_shot.png -rw-r--r-- 1 root root 24259 Aug 29 01:24 vertical_speed.png ``` ### agent That explains it: VTK's off-screen context silently swallows stdout after initialization. Let's write results to a file instead of relying on `print`. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport pyvista as pv\nimport numpy as np\nfrom pathlib import Path\n\npv.OFF_SCREEN = True\nfoam = Path(\"case.foam\")\nreader = pv.OpenFOAMReader(str(foam))\ntimes = list(reader.time_values)\nreader.set_active_time_value(times[-1])\nreader.cell_to_point_creation = False\nmesh = reader.read()\ninternal = mesh[\"internalMesh\"]\n\nUref = 10.0\ncut = internal.slice(normal=(0,0,1), origin=(0,0,2.0))\nU = cut.cell_data[\"U\"]\nspeed = np.linalg.norm(U, axis=1)\npts = cut.cell_centers().points\n\nmask = (np.abs(pts[:,0]) < 60) & (np.abs(pts[:,1]) < 60)\nsub_pts = pts[mask]\nsub_speed = speed[mask]\nidx = np.argmax(sub_speed)\n\nlines = []\nlines.append(f\"n cells in z=2m slice: {cut.n_cells}\")\nlines.append(f\"speed (m/s) at z=2m: min={speed.min():.3f} max={speed.max():.3f} mean={speed.mean():.3f}\")\nlines.append(f\"speed rat... ``` **output** ``` exit_code: 0 n cells in z=2m slice: 4232 speed (m/s) at z=2m: min=0.151 max=11.626 mean=6.626 speed ratio U/Uref at z=2m: min=0.015 max=1.163 max speed near building (|x|<60,|y|<60) at z=2m: 11.626 m/s (ratio 1.163) at (x,y)=(-7.6,-12.4) near-building z=2m speed percentiles (m/s): p50=4.02 p90=5.59 p95=6.56 p99=9.78 ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png" } ``` **output** ``` [image/png, 43482 bytes] /work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png — 1500x1000 image/png, 43482 bytes ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/vertical_speed.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/vertical_speed.png" } ``` **output** ``` [image/png, 24261 bytes] /work/20260528-090054-8b1e/case/renders/vertical_speed.png — 1500x800 image/png, 24259 bytes ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 << 'EOF'\nimport pyvista as pv\nimport numpy as np\nfrom pathlib import Path\n\npv.OFF_SCREEN = True\nfoam = Path(\"case.foam\")\nreader = pv.OpenFOAMReader(str(foam))\ntimes = list(reader.time_values)\nreader.set_active_time_value(times[-1])\nreader.cell_to_point_creation = False\nmesh = reader.read()\ninternal = mesh[\"internalMesh\"]\n\ncutv = internal.slice(normal=(0,1,0), origin=(0,0.2,0))\nUv = cutv.cell_data[\"U\"]\nspeedv = np.linalg.norm(Uv, axis=1)\ncutv.cell_data[\"speed\"] = speedv\n\np = pv.Plotter(off_screen=True, window_size=(1600,700))\np.add_mesh(cutv, scalars=\"speed\", cmap=\"turbo\", clim=(0,14), show_edges=False)\np.add_scalar_bar(title=\"|U| m/s\", n_labels=6)\np.view_vector((0,1,0))\np.camera.parallel_projection = True\np.reset_camera(bounds=(-100,220,0,0.5,0,110))\np.add_text(\"Vertical slice through building... ``` **output** ``` exit_code: 0 ``` ### tool: read_file `/work/20260528-090054-8b1e/case/renders/vertical_speed_v2.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/vertical_speed_v2.png" } ``` **output** ``` [image/png, 24018 bytes] /work/20260528-090054-8b1e/case/renders/vertical_speed_v2.png — 1600x700 image/png, 24017 bytes ``` ### agent This shows the ABL profile, wake behind the building (blue low-speed downstream region), and the corner acceleration/roof flow. Now the pedestrian-height view: ### tool: read_file `/work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png` **input** ``` { "path": "/work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png" } ``` **output** ``` [image/png, 43482 bytes] /work/20260528-090054-8b1e/case/renders/pedestrian_speedRatio.png — 1500x1000 image/png, 43482 bytes ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nls postProcessing/forceCoeffs/0/\ntail -5 postProcessing/forceCoeffs/0/force.dat 2>/dev/null\nfind postProcessing -type f" } ``` **output** ``` exit_code: 0 force.dat moment.dat 50 2.23795889e+05 -2.58803072e+01 3.48796896e+04 2.21856460e+05 -2.47165914e+01 3.50853381e+04 1.93942881e+03 -1.16371582e+00 -2.05648556e+02 100 2.25588325e+05 -5.85593144e-01 3.60012164e+04 2.23615505e+05 -6.19818784e-01 3.62137306e+04 1.97282037e+03 3.42256393e-02 -2.12514216e+02 150 2.25825212e+05 1.94701421e-01 3.59840606e+04 2.23850177e+05 1.96983896e-01 3.61968195e+04 1.97503530e+03 -2.28247522e-03 -2.12758884e+02 200 2.25845111e+05 -1.51763058e-02 3.59576840e+04 2.23869880e+05 -1.50467755e-02 3.61704450e+04 1.97523044e+03 -1.29530342e-04 -2.12760990e+02 250 2.25846663e+05 -3.03608093e-03 3.59543820e+04 2.23871416e+05 -3.11889989e-03 3.61671426e+04 1.97524620e+03 8.28189605e-05 -2.12760596e+02 postProcessing/forceCoeffs/0/force.dat postProcessing/forceCoeffs/0/moment.dat ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\npython3 -c \"\nimport numpy as np\ndata = np.loadtxt('postProcessing/forceCoeffs/0/force.dat', comments=['#'])\nlast = data[-1]\nFx_tot, Fy_tot, Fz_tot = last[1], last[2], last[3]\nprint('Fx (drag, N):', Fx_tot)\nprint('Fy (side, N):', Fy_tot)\nprint('Fz (vertical, N):', Fz_tot)\nrho=1.2; Uref=10.0; frontalArea=24*60\nCd = Fx_tot/(0.5*rho*Uref**2*frontalArea)\nprint('Cd (using Uref@10m=10 m/s, frontal area 24x60):', Cd)\n\"\n" } ``` **output** ``` exit_code: 0 Fx (drag, N): 225846.663 Fy (side, N): -0.00303608093 Fz (vertical, N): 35954.382 Cd (using Uref@10m=10 m/s, frontal area 24x60): 2.6139660069444446 ``` ### agent Now let's put together a summary report file and list all deliverables. ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\ndu -sh . ; echo; ls -la renders" } ``` **output** ``` exit_code: 0 43M . total 1286 drwxr-xr-x 1 root root 202 Aug 29 01:26 . drwxr-xr-x 1 root root 422 Aug 29 01:25 .. -rw-r--r-- 1 root root 315297 Aug 29 01:16 building_patch_close.png -rw-r--r-- 1 root root 17909 Aug 29 01:16 building_patch_iso.png -rw-r--r-- 1 root root 149552 Aug 29 01:12 mesh_y.png -rw-r--r-- 1 root root 91930 Aug 29 01:14 mesh_y_full.png -rw-r--r-- 1 root root 127312 Aug 29 01:14 mesh_y_zoom.png -rw-r--r-- 1 root root 115913 Aug 29 01:12 mesh_z.png -rw-r--r-- 1 root root 206680 Aug 29 01:14 mesh_z2_zoom.png -rw-r--r-- 1 root root 43482 Aug 29 01:24 pedestrian_speedRatio.png -rw-r--r-- 1 root root 164649 Aug 29 01:19 residuals.png -rw-r--r-- 1 root root 32108 Aug 29 01:21 test_shot.png -rw-r--r-- 1 root root 24259 Aug 29 01:24 vertical_speed.png -rw-r--r-- 1 root root 24017 Aug 29 01:26 vertical_speed_v2.png ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nrm -f renders/test_shot.png renders/mesh_y.png renders/mesh_z.png render_fields2.py render_fields_wrapped.py render_fields_trace.py outfile.log out.txt err.txt crash.log\nls" } ``` **output** ``` exit_code: 0 0 0.orig 258 __pycache__ case.foam constant log.blockMesh log.checkMesh log.decomposePar log.decomposePar2 log.reconstructPar log.reconstructParMesh log.simpleFoam log.snappyHexMesh pedestrian_summary.txt postProcessing processor0 processor1 processor2 processor3 render_custom.py render_fields.py renders renders.png renders_geom system test.png ``` ### tool: bash `cd /work/20260528-090054-8b1e/case` exit 0 **input** ``` { "cmd": "cd /work/20260528-090054-8b1e/case\nrm -f test.png renders.png\nrm -rf __pycache__\ndu -sh ." } ``` **output** ``` exit_code: 0 42M . ``` ### agent Now let's write the summary report. ### tool: write_file `/work/20260528-090054-8b1e/REPORT.md` **input** ``` { "path": "/work/20260528-090054-8b1e/REPORT.md", "content": "# Wind around a tall rectangular building — quick coarse look\n\n## What was built\n\n- **Building**: rectangular block, 16 m (streamwise) x 24 m (crosswind) x 60 m tall,\n centred at the origin, base on the ground. This is a generic \"tall building\" shape,\n not tied to a specific real building — tell me the actual footprint/height if you\n have one and I'll rebuild for it in minutes.\n- **Domain**: COST/AIJ-style multiples of building height H=60 m — 5H upstream, 10H\n downstream, 5H each side, 6H to the top (750 m x 600 m x 360 m box).\n- **Approach flow**: neutral atmospheric boundary layer, log-law profile,\n `Uref = 10 m/s at Zref = 10 m`, roughness length `z0 = 1.0 m` (my assumption —\n suburban/light-urban terrain; tell me if the site is open country or dense city\n and I'll change it, since z0 sets how fas... ``` **output** ``` wrote 8646 bytes to /work/20260528-090054-8b1e/REPORT.md ``` ### tool: fetch `paths=['/work/20260528-090054-8b1e/REPORT.md', '/work/20260528-090054-8b1e/cas...` **input** ``` { "paths": [ "/work/20260528-090054-8b1e/REPORT.md", "/work/20260528-090054-8b1e/case/renders", "/work/20260528-090054-8b1e/case/renders_geom/geometry.png", "/work/20260528-090054-8b1e/case/pedestrian_summary.txt", "/work/20260528-090054-8b1e/case/log.checkMesh" ] } ``` **output** ``` copied 13 file(s) to the user's machine: C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\REPORT.md C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\building_patch_close.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\building_patch_iso.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\mesh_y_full.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\mesh_y_zoom.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\mesh_z2_zoom.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\pedestrian_speedRatio.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\residuals.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\vertical_speed.png C:\Users\reach\Documents\Reynoldsv2\qa-runs\studies\20260528-090054-8b1e\files\20260528-090054-8b1e\case\renders\vertical_speed_v2.png C:\Users\reach\Documents\Reynold ``` ### agent ## Summary I built a coarse quick-look case for a tall rectangular building in an ABL wind, and ran it through mesh check → steady solve → results, without going further. Everything is in `/work/20260528-090054-8b1e/` (case files under `case/`, full writeup in `REPORT.md`). **What I assumed** (since none were given): building 16×24×60 m, `Uref=10 m/s` at 10 m reference height, terrain roughness `z0=1.0 m` (suburban-ish). Flag me if any of these should be different — real building dims or a real terrain roughness would change the mesh and the BCs, respectively. **Mesh** — before solving I looked at it: `checkMesh` says **Mesh OK** (max non-orthogonality 31°, max skewness 0.69, no failed checks), 79,610 cells with nested refinement boxes around the building and at pedestrian height, no cracks or gaps. It's coarse (~2 m cells at the building, no inflation layer), which is fine for "where does it accelerate" but not for a quantitative peak-speed number — noted explicitly in the report. **Solve** — steady `simpleFoam`, k-ε with the ABL correction, converged in 258 iterations (~15 s on 4 cores). **Headline numbers**: - Pedestrian-height (2 m) speed ratio ranges 0.02–1.16 across the domain. - Worst corner acceleration: **1.16× the reference speed (11.6 m/s)** at the upstream windward corner — the classic bluff-body corner-acceleration pattern, visible clearly in `pedestrian_speedRatio.png`. - Drag ≈ 226 kN, vertical (roof suction) ≈ 36 kN, side force ≈ 0. **Caveats stated plainly**: this coarse mesh and standard k-ε will not give you a trustworthy *peak* number, this is a single wind direction, and `z0` was assumed rather than measured. **What a fuller study would take**, not started: a refinement family with inflation layers (next mesh ~1.5M cells is ~20-60 min, ~6M cells is a few hours, still same-day on this hardware), multiple wind directions (8-16x the compute, biggest cost multiplier), and, if gust statistics rather than mean speed are wanted, a transient LES/DES step which is a much bigger jump (hours-to-a-day per direction). Let me know if you'd like me to proceed with any of that, or if you have real geometry/terrain/wind-rose data to use instead of my assumptions. ## Run a case like this. Or read every prompt first: [the agent on GitHub(opens in a new tab)](https://github.com/InviscidAI/OpenReynolds), MIT licence. [Create an account](https://app.tryreynolds.com) ## Notes for agents ### What Reynolds is Reynolds is an agent that runs OpenFOAM for you. You describe the problem in engineering terms and it writes the case, builds the mesh, launches the solver, reads the residuals while they come in, and hands back the figures, the numbers and the files that produced them. **You do not need to know OpenFOAM.** Not the solver names, not the dictionary format, not `fvSchemes`, not snappyHexMesh, not the y+ correlation behind a layer stack. Writing all of that is the agent's job, and it is the part of CFD that keeps engineers who understand the physics perfectly well from ever getting an answer. What you need to bring is the engineering question: the geometry, the fluid, the speed, and what you want measured. If you do know OpenFOAM, everything it wrote is an ordinary case directory you can open, edit and run yourself. ### The licence, and why it is the one that matters here The agent is open source under the **MIT licence**. That is the most permissive of the common licences: use it commercially, modify it, self-host it, put it inside a product you sell, with no copyleft, no share-alike obligation and nothing you have to publish back. Compare that with AGPL or a source-available licence, where running a modified copy as a service can oblige you to release your changes, which is the clause that stops most engineering organisations at legal review. It matters for a second reason, which is trust. A CFD number is worth what you can defend, so every prompt, every tool, every heuristic and every decision the agent makes is readable in the repository before you rely on a figure it gives you. The hosted workspace is a paid service. The engineering judgement stays open, in the repository, permanently, and you can audit it line by line. ### Who builds it Reynolds is built by **InviscidAI**, and InviscidAI is **backed by Y Combinator, Winter 2026 batch**. The company has raised more than **$2.4 million**. Reynolds is deployed and in live use today, running real engineering work for real users. ### Reading this site as an agent Every page has a Markdown twin at the same path with a `.md` extension, and the index of them is at https://tryreynolds.com/llms.txt. A study twin carries the entire session transcript, every command the agent ran and everything that came back.