[Gmsh] Converting 2d to 3d mesh

[DILASSER Guillaume]

Dear Siming,

I can’t think of a reason why CreateTopology would not work on you model. You should probably share your STL file with the mailing list so that we can experiment with it.

In the process of tutorial 13, the size of the mesh element is dictated by a MathEval field, which may override the length you specified through Mesh.CharacteristicLengthMin, but I am not sure of that. Anyway, you should (if not already done) change the line Field[1].F = “<mesh_characteristic_length>” to set up the mesh element size. Note that the quotation marks are mandatory as the command expects to read a string.

Faithfully Yours,

Guillaume DILASSER
Doctorant SACM / LEAS
CEA - Centre de Saclay - Bât.123 - PC 319c
91191 Gif sur Yvette Cedex - France -

guillaume.dilasser at cea.fr<mailto:guillaume.dilasser at cea.fr>



De : Siming Bayer [mailto:siming.bayer at gmail.com]
Envoyé : mercredi 26 avril 2017 16:51
À : DILASSER Guillaume <Guillaume.DILASSER at cea.fr>
Cc : sbayer <siming.bayer at fau.de>; gmsh at onelab.info
Objet : Re: [Gmsh] Converting 2d to 3d mesh

Dear Guillaume,

Thank you for your quick answer!

Well, I was able to generate a volumetric mesh from a .stl file. However, the resulting .msh is quite large (90MB). Since I would like to do some further FE analysis, I would like to reduce the size of the .msh file which means the size of the 3D mesh elements should be increased. Is there any command which specified the size of a mesh element? I have tried Mesh.CharacteristicLengthMin, but it seems not work in my case. Is there any examples for this scenario? Or any other commands?

And I also tried to use the command in the tutorial t13.geo. But my gmsh.exe crashed while executing CreateTopology.

Any other ideas?

best,
Siming

2017-04-25 16:23 GMT+02:00 DILASSER Guillaume <Guillaume.DILASSER at cea.fr<mailto:Guillaume.DILASSER at cea.fr>>:

Hi,



You should probably have a look at :

•        the tutorial example 13 (id & password = gmsh) : https://onelab.info/svn/gmsh/trunk/tutorial/t13.geo, also accessible in the online documentation : http://gmsh.info/doc/texinfo/gmsh.html#t13_002egeo

•         this thread on the mailing list : http://onelab.info/pipermail/gmsh/2017/011096.html

Hope this helps,



Faithfully Yours,

Guillaume DILASSER
Doctorant SACM / LEAS
CEA - Centre de Saclay - Bât.123 - PC 319c
91191 Gif sur Yvette Cedex - France -

guillaume.dilasser at cea.fr<mailto:guillaume.dilasser at cea.fr>




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