problem to load the .msh mesh (Gmsh) on NGSOLVE

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1

Hi,

I would like to conver my gmsh mesh (.msh) to netgen format (.vol). The problem is when I load the .vol file on NGSOLVE (graphics interface) I only observe the meshing on the surface and not in the whole volume.

The code for transform the gmsh mesh is the following:

 from netgen.read_gmsh import ReadGmsh
 from netgen.meshing import *

 # import the Gmsh 2.22 file to a Netgen mesh object

 mesh = ReadGmsh("disk.msh")
 from ngsolve import *
 mesh = Mesh(mesh)
 mesh.ngmesh.Save("disk.vol")

The disk.msh is attached in zip format.

I have tried to put generate mesh (It is not the idea since I would like to be able to use the imported mesh from gmsh), but I obtain the following error:

SYSTEM ERROR: more elements on face

Thanks

Attachment: disk.zip

2

Hello,

The generated disk.vol file contains volume elements (check the “volelements” token in the file). The Netgen GUI does not show volume elements by default, you can activate this in
View → Viewing Options → Mesh → Show tets in domain (activate the checkbox)

Best,
Matthias

3

Thank you, I have noticed that. But I have tried to use the vol file created from gmsh in my simulation and it hasn’t worked. However, creating the same disk on netgen, works.

I don’t really know what the problem will be.