[sebonator]

Hi there!

I want to import a multi-region Mesh I created with Gambit. I know that there is an option for the "fluentMeshToFoam" utility, that is able to create cellZones from the regions I defined in Gambit. Well, this all works fine for conformal meshes (meshes, in which the cells on both sides of an interface exactly match). In that case, all the interior patches are named in a "Region1_To_Region2" manner by the "splitMeshRegions" utility and everything is fine.

My situation now is, that I want to simulate the heat exchange between a turbulent flow and a solid, so there is no chance to make the meshes conformal, because this would require a far more finer mesh on the solid region than I am able to allow due to simulation time.

The actual problem is, that the "splitMeshRegions" utility does not create the interior patches in this clear "Region1_To_Region2" manner, but takes all interior patches into one single patch and I am not able to set the internal transition conditions properly anymore.

I already tried to form the internal patches manually after using the "splitMeshRegions" utility, but I am not able to find out the "startFace"-Numbers of the individual internal patches. Even if I use the "-writeSets" option for the "fluentMeshToFoam" utility and look at the different facesets, I am not able to find out the "startFaces"-Numbers, because the faces listed in the "faceSets" files seem to be ordered in a way that differs from the one used in the "faceZones" file. Also, I am not able to open the "cellZones" and "faceZones" files which are created by the "fluentMeshToFoam" utility. They seem to be in a binary format or something like that, because gedit does not want to open them.

Another idea was to import all the regions seperately. This would not be that beatiful of course, but it would be OK as I only have to do that once. The problem with this idea is, that I don't know if putting the regions together by hand is enough for the chtMultiRegionFoam-Solver. The "splitMeshRegions" utility always craetes files called "cellToRegion" in several folders, but as I am not able to open those either, I can't estimate if they are necessary for the solver.

Has anybody an easy solution for solving this problem? If not, then can you please explain how to find out the "startFaces"-Numbers of the internal patches for me? If you can't help me there either, could you then please tell me what information the solver needs, when I try to put all regions together by hand?

Thank you so much for any suggestions!
Greetings Sebastian