{
  "schema": "walter-cfd-status-v1",
  "updated_utc": "2026-09-06T01:19:44.453653+00:00",
  "solver": "OpenFOAM OpenCFD1912 patch200626; Ubuntu22.04 arm64 package1912.200626-1",
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  "model_id": "walter-r08-rear-service-20260905",
  "enclosure_cfd_validated": false,
  "temperature_field_available": true,
  "airflow_field_available": true,
  "runtime_limits": {
    "vm_memory_gib": 2,
    "vm_cpus": 2,
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      "scope": "All R08 physical shapes; simplified electronics; cables absent; nominal finest cells2.5mm, unresolved narrow seams/vents. Single retained fluid region does not by itself prove correct vent connectivity.",
      "thermal_field_solved": false
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      "case": "R08-cartesian-study",
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      "scope": "All R08 physical shapes; simplified electronics; cables absent; nominal finest cells2.5mm, unresolved narrow seams/vents. Single retained fluid region does not by itself prove correct vent connectivity.",
      "thermal_field_solved": false
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  "feature_resolution": {
    "scope": "Nominal CAD feature audit against preliminary2.5mm finest mesh, not measured vent throat or installed air resistance",
    "finest_nominal_cell_mm": 2.5,
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        "name": "Upper rear exhaust slot cutter",
        "nominal_small_dimension_mm": 4,
        "nominal_cells_across": 1.6,
        "geometry": "Seven4x24mm cuts across the upper rear"
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        "nominal_small_dimension_mm": 4,
        "nominal_cells_across": 1.6,
        "geometry": "Three4mm-high cuts per side"
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      {
        "name": "Ear grille perforation",
        "nominal_small_dimension_mm": 3.3,
        "nominal_cells_across": 1.32,
        "geometry": "Circular CAD holes; speaker driver and acoustic cloth can obstruct their route"
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        "nominal_small_dimension_mm": 0.4,
        "nominal_cells_across": 0.16,
        "geometry": "Nominal split between276.8 and277.2mm; installed leakage or sealing is unverified"
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    "meaning": "This mesh cannot establish the pressure loss of these narrow features. Mesh cells, not the printable artistic shell, need refinement. Treat intended sealed joints only after specifying their physical overlap/gasket; do not silently seal real air gaps in simulation.",
    "sources": [
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        "path": "work/walter-helmet-R07/build_walter.py",
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  "next_requirements": [
    "Resolve mesh topology and narrow-feature resolution; repeat mesh and domain independence checks.",
    "Confirm installed cooler identity, fan pressure-flow data and room/local-air temperature.",
    "Measure board and peripheral input power under representative sustained workload.",
    "Complete cable, adapter and power-system geometry; assign material and thermal-contact properties.",
    "Solve conjugate heat transfer with fan operation, verify mass/energy balances, and compare with physical prototype measurements."
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    "study": {
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      "other_heat_sources": "Omitted",
      "shell_conduction": "Adiabatic obstacles; no coupled solids",
      "heat_assignment": "12W uniformly across modeled Pi PCB surface; not CPU-die heat or measured board load",
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        "constant/polyMesh/points": "1eef963ab1ebe609605bd87c6b7a75701cdca35b0f39ba40b5805bb8d8e34e1b",
        "constant/polyMesh/cellZones": "f3ec1850b17284b3056587e7b0bcc398b523f80f3e51891cfc5a931b38165b54",
        "constant/polyMesh/faces": "1b9f695192e42c51290006e83bdbf87d313b59a887358d7c664b0965d2d0acb0",
        "constant/polyMesh/sets/edgeFaces": "143c5ab2160c63ed3e2d6ce5715627d2e443c48fa6933502e04c36d40e275806",
        "constant/polyMesh/sets/concaveCells": "57198816e14d1a7c832d0ee92827073c9e48448cb7a64c1808e53047a52199dc",
        "constant/polyMesh/sets/nearPoints": "e5e7100394fc35dc3770844f09087d81588eb76277b5db229dc255f356801632",
        "constant/polyMesh/sets/nonManifoldPoints": "672cb52de39d33da93089f375525b29cc137aded6ded6e79dea2e3d7dd816c66",
        "system/fvSchemes": "997d7718f7154998b73f6f0fc60ead16bcb3dcc6f23618a416f87e676d9a8abf",
        "system/fvSolution": "96a362ed463510bbbdf6677c81f9c2781d5d286f3384ef29e49721e36116d5d6",
        "system/streamlines": "93e225d07496e933ea0d056d45c237e8df8042c8f347e1af09a1080d4eee911e",
        "system/heatBalance": "a57ad2f57565afc1b169198cd1323a35665cc56b6960aa33e05f32d96029b93f",
        "system/controlDict": "c3a816fdc25cadbc396129e40338ad5c50c079987cda6a63d1b46b1dd5fd1b0d"
      },
      "solver_log_sha256": "2cc892ec3dc54800d9783186924a1710a0c30b3a49f8eaa9382d334ce28220ab",
      "heat_boundary_integral_w": 12,
      "heat_boundary_note": "wallHeatFlux integrated over Pi at t=0.5s; not a complete transient energy-balance validation"
    }
  }
}