[Adam Persson]

Hello,
I have recently started using enGrid for meshing, and find it rather useful. This far I have only used it for meshing simple geometry for simpleFoam, but I would like to add a rotating region using the MRF approach. Do you know if there is some way of defining cellZones for MRF using enGrid, or am I limited to snappyHexMesh?

Would it be possible to create the stationary region as one mesh file and the rotating region as another mesh file, merging these using mergeMesh, and then stitching the patches between regions using stitchMesh?
Do any of you know if the mesh of the two regions need to align in order to use the stitchMesh utility, or will the utility take care of this even if the discretization is not identical?

I am grateful for any input!
Best regards,
Adam

[student666]

I think you already answered you're own question.

Have a look here:
http://www.sourceflux.de/blog/genera...snappyhexmesh/

Cheers.

[student666]

And I suggest you to use cyclicAMI BC at interfaces, but when you use fvOption, don't forget to specify not rotating patches, or you'll have strange behaviour.

http://www.slideshare.net/fumiyanoza...using-openfoam

Bye

[ogloth]

Adam,

the functionality is already implemented, but not available from the GUI. If you edit the file foamwriter.cpp in the current master branch, you will see the following lines of C++ at the top of the file:

FoamWriter::FoamWriter()
{
  EG_TYPENAME;
  setFormat("Foam boundary files(boundary)");
  setExtension("");
  m_CreateCellZones = false;//true;
  m_NoDialog = false;
}

If you set the variable m_CreateCellZones=true, engrid should export multiple volumes into cell zones, rather than create multiple regions.

Best regards,
Oliver