[swifty]

Hello,

I am trying to run snappyHexMesh in parallel using openFOAM 2.1.0 to mesh an aerofoil. I had it working without any problems in serial first, I only have problems now I am trying in parallel. I start by running blockMesh to generate a base mesh, then I decompose the mesh using scotch for 2 processors. Then change the decompose dictionary to ptscotch and run snappyHexMesh. This fails with the following error,

[0] processorPolyPatch::calcGeometry : Writing my 6925 faces to OBJ file "/home/aswift/OpenFOAM/aswift-2.1.0/run/coord_seligFmt/aerofoil/processor0/procBoundary0to1_faces.obj"
[1] processorPolyPatch::calcGeometry : Writing my 6925 faces to OBJ file "/home/aswift/OpenFOAM/aswift-2.1.0/run/coord_seligFmt/aerofoil/processor1/procBoundary1to0_faces.obj"
[1] processorPolyPatch::calcGeometry : Dumping cell centre lines between corresponding face centres to OBJ file"/home/aswift/OpenFOAM/aswift-2.1.0/run/coord_seligFmt/aerofoil/processor1/procBoundary1to0_faceCentresConnections.obj"
[0] processorPolyPatch::calcGeometry : Dumping cell centre lines between corresponding face centres to OBJ file"/home/aswift/OpenFOAM/aswift-2.1.0/run/coord_seligFmt/aerofoil/processor0/procBoundary0to1_faceCentresConnections.obj"
[1]
[1]
[1] --> FOAM FATAL ERROR:
[1] face 597 area does not match neighbour by 0.103929% -- possible face ordering problem.
patchrocBoundary1to0 my area:1.33687e-05 neighbour area:1.33549e-05 matching tolerance:6.7218e-10
Mesh face:2108231 vertices:4((0.535348 -0.114329 0.03125) (0.539191 -0.114329 0.03125) (0.539191 -0.110848 0.03125) (0.535348 -0.110851 0.03125))
If you are certain your matching is correct you can increase the 'matchTolerance' setting in the patch dictionary in the boundary file.
Rerun with processor debug flag set for more information.
[1]
[1] From function processorPolyPatch::calcGeometry()
[1] in file meshes/polyMesh/polyPatches/constraint/processor/processorPolyPatch.C at line 239.
[1]
FOAM parallel run exiting
[1]

To try and solve this error I have tried adding a renumberMesh command before snappyHexMesh in my run file, but that doesn't help. I have tried changing the matchTolerance value in the processor0 and 1 folders, but the value appears to be overwritten.

I have attached the snappyHexMesh log and the files I use for the run.

I would be grateful for any help.

Regards

Swifty