[cfMesh] CFMesh with OpenFOAM 7, binary format

bennn · March 26, 2020, 08:05

Hi all,

When trying to mesh a case in binary format in openfoam 7, the meshing works but checkMesh and solvers crash with

"Expected a ')' while reading binaryBlock"

Which reminds me of WM_LABEL_SIZE issues

If you mesh for instance sawOctree in the tutorials, checkMesh will crash.

I tried looking at the issue but no luck so far. Any idea ?
Thanks.

Niteck · April 5, 2020, 20:27

I'm having the same issue here.

Fortunately, there are some possible workarounds.

1) Use another OpenFOAM version (e.g., OpenFOAM 5 or OpenFOAM v1912) to "convert" the constant/polyMesh data via the foamFormatConvert utility. I know, it is kinda redundant; but it works.

2) If one doesn't have another OpenFOAM distribution available, an alternative is to save the polyMesh data in ASCII and then convert it to binary. For that, I would suggest to set a higher writePrecision value in system/controlDict. Perhaps, something around 16 is good enough. Then, just generate the mesh using cfMesh, set writeFormat back to binary in system/controlDict, and run foamFormatConvert.

Hope this helps.

bennn · April 18, 2020, 18:18

Hi ! thanks for your idea.

Unfortunately, using ASCII is not an option because the files would get a lot larger than I can afford.

March 26, 2020, 08:05	CFMesh with OpenFOAM 7, binary format	#1
bennn Member benoit paillard Join Date: Mar 2010 Posts: 96 Rep Power: 16	Hi all, When trying to mesh a case in binary format in openfoam 7, the meshing works but checkMesh and solvers crash with "Expected a ')' while reading binaryBlock" Which reminds me of WM_LABEL_SIZE issues If you mesh for instance sawOctree in the tutorials, checkMesh will crash. I tried looking at the issue but no luck so far. Any idea ? Thanks.

April 5, 2020, 20:27		#2
Niteck New Member Gabriel dos Santos Join Date: Jul 2015 Posts: 1 Rep Power: 0	I'm having the same issue here. Fortunately, there are some possible workarounds. 1) Use another OpenFOAM version (e.g., OpenFOAM 5 or OpenFOAM v1912) to "convert" the constant/polyMesh data via the foamFormatConvert utility. I know, it is kinda redundant; but it works. 2) If one doesn't have another OpenFOAM distribution available, an alternative is to save the polyMesh data in ASCII and then convert it to binary. For that, I would suggest to set a higher writePrecision value in system/controlDict. Perhaps, something around 16 is good enough. Then, just generate the mesh using cfMesh, set writeFormat back to binary in system/controlDict, and run foamFormatConvert. Hope this helps. Last edited by Niteck; April 6, 2020 at 10:06. Reason: corrected typo

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April 18, 2020, 18:18		#3
bennn Member benoit paillard Join Date: Mar 2010 Posts: 96 Rep Power: 16	Hi ! thanks for your idea. Unfortunately, using ASCII is not an option because the files would get a lot larger than I can afford.