[Salome] Non-matching meshes on mesh parts

giorgianig · June 20, 2023, 10:13

Dear all, I am modeling a network of pipes connected with T elements.
I generated a partion of the geometry where I divided the Ts from the straight pipes, in order to use an unstructured mesh on Ts and structured on pipes. The whole geometry must have a boundary layer on the walls also.

I generated the mesh starting with a Netgen 3D on a T, propagated on the pipes using 3D extrusion, and again Net3D on the following Ts. The mesh generation seems fine. However, when I export the mesh (I use salomeToOpenFOAM.py) the export fails with "IndexError: list assignment index out of range" and some defaultPatches are generated. Those default patches are places at the pipe/T junctions where the T mesh is generated AFTER the pipe mesh.

Is there a way to avoid this? Unfortunately I cannot generate all the T meshes before because of pipes connecting different Ts which would imply having extrusion constrained at both ends.

Thanks in advance!

giorgianig · June 20, 2023, 10:18

Sorry I posted it twice, please use the other post...

June 20, 2023, 10:13	Non-matching meshes on mesh parts	#1
giorgianig Member Giorgio Join Date: Mar 2023 Posts: 55 Rep Power: 3	Dear all, I am modeling a network of pipes connected with T elements. I generated a partion of the geometry where I divided the Ts from the straight pipes, in order to use an unstructured mesh on Ts and structured on pipes. The whole geometry must have a boundary layer on the walls also. I generated the mesh starting with a Netgen 3D on a T, propagated on the pipes using 3D extrusion, and again Net3D on the following Ts. The mesh generation seems fine. However, when I export the mesh (I use salomeToOpenFOAM.py) the export fails with "IndexError: list assignment index out of range" and some defaultPatches are generated. Those default patches are places at the pipe/T junctions where the T mesh is generated AFTER the pipe mesh. Is there a way to avoid this? Unfortunately I cannot generate all the T meshes before because of pipes connecting different Ts which would imply having extrusion constrained at both ends. Thanks in advance!

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June 20, 2023, 10:18		#2
giorgianig Member Giorgio Join Date: Mar 2023 Posts: 55 Rep Power: 3	Sorry I posted it twice, please use the other post...