chtMutiRegionFoam without topoSetDict
 

Hi Bibin,

yes there are ways to create multi regions without using topoSet.
One way that I used that works with Salome is to create two meshes (or more, depending on how many regions you have), create the boundary that will be the interface between the regions. After that export and convert it to the openfoam format, run splitMeshRegions and create the interfaces on the boundary file.

There are others/better ways to do this, although I don't have enough experience to give you the best answer. However, I believe snappyHexMesh has ways to do it as well.

Hi, i am trying to run a chtMultiRegionFoam, i have 3 bodyes, the fluid pipe, and inside i have 2 obstacles, 1 solid, and one porous.
My mesh was created with ansys and exported, later i used the command
splitMeshRegions -cellZones -overwrite in order to put my 3 domains,
but when create the porous zone, this command create the internal faces as wall, how can avoid this? the fluid flow through the porous media. this 2 walls have to be internal faces

porosity_to_part_4-solid
{
type mappedWall;
inGroups 1(wall);
nFaces 24192;
startFace 1479713;
sampleMode nearestPatchFace;
sampleRegion part_4-solid;
samplePatch part_4-solid_to_porosity;
}