Execute the following commands :-
blockMesh
surfaceFeatureExtract
decomposePar -force
foamJob -parallel -screen snappyHexMesh -overwrite
reconstructParMesh -constant
copy and paste the polyMesh folder in cold folder
Change the locationInMesh for hot in snappyHexMeshdict
blockMesh
surfaceFeautureExtract
decomposePar -force
foamJob -parallel -screen snappyHexMesh -overwrite
reconstructParMesh -constant
copy and paste the polyMesh folder in hot folder
decomposePar -force -allRegions
foamJob -parallel -screen chtMultiRegionSimpleFoam