splitMeshRegions does not split one cellZone after snappyHexMesh
 

Hi all,

Based on the snappyMultiRegionHeater example, I am meshing a similar case with 3 domains using snappyHexMesh. I generated the STL files from ImageJ (as shown in the first image).

snappyHexMesh refines the mesh at the interfaces (as shown in the second image) but splitMeshRegions -cellZones -overwrite does not separate the three regions (as shown in the third image).

When I checked the constant/polyMesh/cellZones after snappyHexMesh, one of the regions had only 1 element which was not expected, I am not sure why.

Any ideas? Your help would be heartfully appreciated.
Cheers,
Sarah