[Gmsh] Meshing 2D without refinement

[Zenker, Dr. Matthias]

Hi,

stupid question: if you already have a mesh, why would you want to build another one in gmsh, instead of keeping your existing one?

You can of course combine four triangles into one, but AFAIK not within gmsh.
The triangle size is controlled by the "characteristic length" parameter, which is the fourth parameter in the Point declaration in the geo file.
You can also control the mesh element size via the "Min/Max element size" field in "Tools->Options->Mesh->General".

If all else fails, can you send a minimalistic example?

HTH,

Matthias

-----Ursprüngliche Nachricht-----
Von: Heinz Zorn [mailto:heinz.zorn at yahoo.de]
Gesendet: Dienstag, 6. Dezember 2011 20:40
An: gmsh at geuz.org
Betreff: [Gmsh] Meshing 2D without refinement

Hello,

i have to convert a mesh in a strange format to a gmsh .msh. I already managed to extract all the elements of the original mesh and to write only the outer-surface Points, Splines and Surfaces to a .geo-file. The meshing works fine but the 2D-meshing refines my already existing triangle surfaces. So the element size of the converted mesh is smaller then the original. I hope you understand the problem, otherwise please ask me for further information.

Is there any possibility to
-either combine the for little triangles of the 2D-meshed surface back one -or do a 2D-meshing without refinement of the existing surfaces.

Best regards and thanks for your answers!




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