[Gmsh] FEA post-processing

Jean-François Remacle jean-francois.remacle at uclouvain.be
Sat Jun 17 12:17:11 CEST 2017

Le 16 juin 2017 à 17:01, paul.carrico at free.fr<mailto:paul.carrico at free.fr> a écrit :

Hi All

Hello Paul

I'm thinking in interfacing a FEA code to Gmsh for post-processing results ; for that topic the documentation is speaking about an old file format (legacy).

Where can I find the right format?

There are two formats. One (the legacy one) is self contained and is made of objects (triangles, tets, hexes) with datas.
There is no connectivity : every object is treated independently. See http://gmsh.info/doc/texinfo/gmsh.html#POS-ASCII-file-format.

The second format is more standard. You have to have a mesh (i.e. a connectivity) and FE results can be saved as data’s for
that mesh. The doc is in http://gmsh.info/doc/texinfo/gmsh.html#MSH-ASCII-file-format, see sections $NodeData, $ElementData
and $ElementNodeData.

Is all the element supported (from shell to volumic elements - 1rst to 2nd order ones)?

Yes. High order elements are supported, in both formats.

Is there a limitation in terms of max number of elements?

No :-) The only limitation is the RAM of your computer. Note that the second format with $NodeData is clearly cheaper
in term of memory.

Thanks for any feedback



Prof. Jean-Francois Remacle
Universite catholique de Louvain (UCL)
Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering
Institute of Mechanics, Materials and Civil Engineering (iMMC)
Center for Systems Engineering and Applied Mechanics (CESAME)
Tel : +32-10-472352 -- Mobile : +32-473-909930

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