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CloudHPC

https://cloudhpc.cloud/2025/11/21/mastering-multi-region-meshing-for-openfoam-conjugate-heat-transfer-cht/

Overall: Tutorial-style blog post from CloudHPC (cloud HPC/engineering-simulation provider, author Ruggero Poletto) on building conformal multi-region meshes for OpenFOAM CHT (chtMultiRegionFoam family) — both the snappyHexMesh route (STL + cellZones + splitMeshRegions) and a CAD-based SALOME route (STEP/IGES + Partition + UNV export). Ends with a trial-signup pitch, but the technical body is a genuine how-to.

Video ideas:

  • Why fluid-solid interface faces must be conformal in chtMultiRegionFoam, and what breaks (heat flux conservation) when they aren't
  • snappyHexMesh CHT workflow walkthrough: STL import, cellZones tagging, then splitMeshRegions to go from one mesh to per-region polyMesh
  • CAD-based alternative for CHT meshing: SALOME's Partition operation to force node-conformal fluid/solid volumes before meshing
  • Multi-region OpenFOAM case anatomy explained: how case/boundary structure changes once split into per-region polyMesh directories, and what mappedWall patches do
  • SALOME to OpenFOAM mesh handoff: UNV export and ideasUnvToFoam conversion, common pitfalls

Feature gaps:

  • Explicit interface-conformality check/diagnostic between fluid and solid mesh regions (verify vertices/faces match before solve) — worth checking if hcalc surfaces this or silently assumes it from netgen's conforming CHT mesh
  • A CAD-first (STEP/IGES) meshing route analogous to the SALOME Partition workflow, as an alternative to snappy/netgen, for complex conformal interfaces
  • UNV mesh import/export support (SALOME/Ideas format) as an interchange path for externally-meshed geometry