[Gmsh] Gmsh trouble converting to openFOAM?

skodali · June 9, 2020, 20:54

I have had a lot of trouble with gmsh recently. I believe I finally got a unstructured volume mesh, however.

So anyway, I finally generated a volume mesh with an internal 'hole volume' (boundary), and I exported the .msh file, and if I choose version 4 ASCII I get an error that it cannot convert "higher-order" meshes. I don't know how to generate lower order meshes in gmsh... or that it was even generating higher-order meshes.

I try exporting Version 1, and it successfully converts, but everything is 1 zone, 0, where does it find the zone information?? Does anyone know how to remedy this? https://i.imgur.com/sHpGeLF.png

Any help would be really appreciated.

EDIT:

Solved! The problem was that in addition to making a volume elementary entity before generating the volume mesh, I also had to add a volume physical group before exporting it. Then, I exported it using version 2, and unchecked the all elements box.

elorriaux · June 10, 2020, 18:51

Hello, try using gmsh version 2 format, in ascii.

June 9, 2020, 20:54	Gmsh trouble converting to openFOAM?	#1
skodali New Member NotApplicable Join Date: Jun 2020 Posts: 2 Rep Power: 0	I have had a lot of trouble with gmsh recently. I believe I finally got a unstructured volume mesh, however. So anyway, I finally generated a volume mesh with an internal 'hole volume' (boundary), and I exported the .msh file, and if I choose version 4 ASCII I get an error that it cannot convert "higher-order" meshes. I don't know how to generate lower order meshes in gmsh... or that it was even generating higher-order meshes. I try exporting Version 1, and it successfully converts, but everything is 1 zone, 0, where does it find the zone information?? Does anyone know how to remedy this? https://i.imgur.com/sHpGeLF.png Any help would be really appreciated. EDIT: Solved! The problem was that in addition to making a volume elementary entity before generating the volume mesh, I also had to add a volume physical group before exporting it. Then, I exported it using version 2, and unchecked the all elements box. Last edited by skodali; June 14, 2020 at 20:33.

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June 10, 2020, 18:51		#2
elorriaux Member Etienne Lorriaux Join Date: Mar 2009 Location: Compiegne, France Posts: 45 Rep Power: 17	Hello, try using gmsh version 2 format, in ascii.