[Gmsh] MSH Format

[Christophe Geuzaine]

On 07/07/11 21:27, Ted Kord wrote:
> This may be a naive question but humour me.
>
> I've meshed my geometry using Gmsh  and the mesh file has the usual
> format. In the $Elements section, there's connectivity for triangles and
> tetrahedra. Am I correct in saying that:
>
> a) the triangles are surface/boundary elements and
>
> b) I can ignore the triangles (if for the moment, I'm not concerned with
> boundary conditions, etc) and only use the connectivity information for
> the tetrahedra and still have the mesh and its nodes correctly represented?
>
> If the answers to these are 'NO', is there a way for me to generate a
> mesh with only nodes and connectivity information for tetrahedral
> elements only?

Define a (or more) Physical Volume(s). Then Gmsh will only save the 
volume elements belonging to those.

>
> ..
> $MeshFormat
> 2.2 0 8
> $EndMeshFormat
> $Nodes
> 241401
> 1 2.848267 -65.8432 2.187612
> ..
> ..
> $EndNodes
> $Elements
> 1379514
> 1 1 2 0 7 1102 1101
> ..
> ..
> 210000 4 2 0 9 189345 47114 189340 189339
> 210001 4 2 0 9 189345 47114 48392 189340
> $EndElements
>
>
> --
> Best regards,
>
> Theodore
>
>
>
>
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine