[Gmsh] GmshToFoam

zile96 · March 22, 2021, 13:20

Hi everyone

I have a problem with conversion of Gmsh mesh to OpenFoam. GmshToFoam utility read physical names, points and cells form .msh file, but when generate "constant folder", there is no patches generated for every physical surface. There is only default patch0.

nasa55 · March 25, 2021, 05:43

Quote:

Originally Posted by zile96

Hi everyone

I have a problem with conversion of Gmsh mesh to OpenFoam. GmshToFoam utility read physical names, points and cells form .msh file, but when generate "constant folder", there is no patches generated for every physical surface. There is only default patch0.

Have you specified both Physical Surface and Physical Volume for your geometry?

nasa55 · March 25, 2021, 05:52

Quote:

Originally Posted by zile96

Hi everyone

I have a problem with conversion of Gmsh mesh to OpenFoam. GmshToFoam utility read physical names, points and cells form .msh file, but when generate "constant folder", there is no patches generated for every physical surface. There is only default patch0.

Have you tried with a different version of Gmsh? My experience is different from version to version and I suggest follow the tutorials in each version and don't mix them up.

zile96 · March 25, 2021, 05:54

Yes, I did. I found the problem. For some reason, when I export .msh file, every element is assigned to physical group 0. That is why gmshToFoam makes one boundary condition.
Anyway, i found solution in exporting to .neu format from Gmsh, and then, with gambitToFoam conversion is done perfectly

wa$$im · March 27, 2021, 05:58

I am glad you solved your problem.
But there is a much straighfoward way to do it.

Try specifying the physical groupements as nasa55 said. But verify you specified them well in tools->visibility before exporting the mesh.

This will certainly do it.

Regards.

March 22, 2021, 13:20	GmshToFoam	#1
zile96 New Member Zivota Lazarevic Join Date: Mar 2021 Posts: 4 Rep Power: 5	Hi everyone I have a problem with conversion of Gmsh mesh to OpenFoam. GmshToFoam utility read physical names, points and cells form .msh file, but when generate "constant folder", there is no patches generated for every physical surface. There is only default patch0.

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March 25, 2021, 05:54		#4
zile96 New Member Zivota Lazarevic Join Date: Mar 2021 Posts: 4 Rep Power: 5	Yes, I did. I found the problem. For some reason, when I export .msh file, every element is assigned to physical group 0. That is why gmshToFoam makes one boundary condition. Anyway, i found solution in exporting to .neu format from Gmsh, and then, with gambitToFoam conversion is done perfectly

March 27, 2021, 05:58		#5
wa$$im New Member Wassim Abdel Nour Join Date: Feb 2021 Location: France Posts: 16 Blog Entries: 1 Rep Power: 5	I am glad you solved your problem. But there is a much straighfoward way to do it. Try specifying the physical groupements as nasa55 said. But verify you specified them well in tools->visibility before exporting the mesh. This will certainly do it. Regards.