[Commercial meshers] Problems converting CCM polyedric mesh in OpenFOAM

stardust23 · April 30, 2020, 06:46

Dear all,
I have a nice polyedric mesh generated with starccm+ and I would need to convert it in OpenFOAM format. Normally, the utility to do it is ccmToFoam that works correctly with hexa and tetra meshes but leads to not acceptable results when dealing with polyedric cells as you can see from the attached screenshots.
Any idea about how to properly convert this mesh in OpenFOAM format?

tomf · May 1, 2020, 04:18

Hi,

It is probably just a visualization issue. Just turn off the flag decompose polyhedra in ParaView and load the data again.

Cheers,
Tom

HPE · May 1, 2020, 04:30

Do check also the mesh metrics by:

checkMesh -allGeometry -allTopology

or

mpirun -np X checkMesh -allGeometry -allTopology -parallel

+1: I agree that the above is very likely related to the visualisation.

stardust23 · May 4, 2020, 03:21

Thanks for your replies, actually I did not notice the Decompose Polyhedra checkbox that is present when uploading a case. Un-ticking it the grid looks correctly converted.

May 1, 2020, 04:30		#3
HPE Senior Member Herpes Free Engineer Join Date: Sep 2019 Location: The Home Under The Ground with the Lost Boys Posts: 932 Rep Power: 12	Do check also the mesh metrics by: checkMesh -allGeometry -allTopology or mpirun -np X checkMesh -allGeometry -allTopology -parallel +1: I agree that the above is very likely related to the visualisation. __________________ The OpenFOAM community is the biggest contributor to OpenFOAM: User guide/Wiki-1/Wiki-2/Code guide/Code Wiki/Journal Nilsson/Guerrero/Holzinger/Holzmann/Nagy/Santos/Nozaki/Jasak/Primer Governance Bugs/Features: OpenFOAM (ESI-OpenCFD-Trademark) Bugs/Features: FOAM-Extend (Wikki-FSB) Bugs: OpenFOAM.org How to create a MWE New: Forkable OpenFOAM mirror

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May 1, 2020, 04:18		#2
tomf Senior Member Tom Fahner Join Date: Mar 2009 Location: Breda, Netherlands Posts: 638 Rep Power: 32	Hi, It is probably just a visualization issue. Just turn off the flag decompose polyhedra in ParaView and load the data again. Cheers, Tom

May 4, 2020, 03:21		#4
stardust23 New Member Join Date: Feb 2020 Posts: 12 Rep Power: 6	Thanks for your replies, actually I did not notice the Decompose Polyhedra checkbox that is present when uploading a case. Un-ticking it the grid looks correctly converted.