hello, many thanks, Guillaume Dilasser und Benjamin Jeanty-Ruard, for your advices and time.
Unfortunally, I need that the surface mesh remains identic (same number and positions of nodes), so your proposals are not suited to my problem. I thought that any mesher (also those in GMSH) should be able to create a 3D-mesh based on a closed hull of 2D-elements. Does anyone else know if and how this can be achieved with GMSH? If not I will search for another tool, thank you again and best regards Johannes Ackva On 20.02.2017 15:12, DILASSER Guillaume wrote: > Hi Johannes, > > > > The option -3 does indeed call the 3D meshing algorithm but for it to > work, volumes have to be defined. In your case, since you feed Gmsh a > MED file, you don't have any Gmsh geometrical elements declared, just > pure mesh and the program does not know how to handle it. The first step > is therefore to re-build geometrical elements to establish a model of > your shell and then call the 3D algorithm to mesh inside. Have a look at > the enclose files and let me know if it helped. Note that this procedure > will re-mesh the shell and thus you might not (read : certainly won't) > have the same surface mesh in you output file as in your input MED... > > > > Sincerely Yours, > > > > Guillaume DILASSER > > Doctorant SACM / LEAS > > CEA - Centre de Saclay - Bât.123 - PC 319c > > 91191 Gif sur Yvette Cedex - France - > > > > [email protected] <mailto:[email protected]> > > > > > > -----Message d'origine----- > De : gmsh [mailto:[email protected]] De la part de > Johannes_ACKVA > Envoyé : lundi 20 février 2017 12:37 > À : [email protected] > Objet : [Gmsh] how fill a 2D-mesh with 3D-elements calling GMSH from the > shell > > > > hello > > > > how can I fill a closed hull of 2D-elements with 3D-elements, by calling > GMSH from the shell? > > > > I tried this: > > > > > >> gmsh MeshTria_2D.med -3 -o quark.med > > > > Info : Running '/opt/gmsh-2.13.1-Linux/bin/gmsh MeshTria_2D.med -3 -o > > quark.med' [Gmsh 2.13.1, 1 node, max. 1 thread] > > Info : Started on Mon Feb 20 09:20:03 2017 > > Info : Reading 'MeshTria_2D.med'... > > Info : Reading MED file V3.2.0 using MED library V3.2.0 > > Info : Reading 3-D unstructured mesh <<MeshTria_2D>> > > Info : Done reading 'MeshTria_2D.med' > > Info : Finalized high order topology of periodic connections > > Info : Meshing 1D... > > Info : Done meshing 1D (8e-06 s) > > Info : Meshing 2D... > > Info : Done meshing 2D (6.91414e-06 s) > > Info : Meshing 3D... > > Info : Done meshing 3D (5e-06 s) > > Info : 8 vertices 24 elements > > Info : Writing 'quark.med'... > > Info : Done writing 'quark.med' > > Info : Stopped on Mon Feb 20 09:20:03 2017 > > > > but the resulting mesh does not contain any 3D-elements, it is identic > to the input mesh. > > > > Moreover, I discovered that after loading the 2D-mesh (MeshTria_2D.med) > into the GUI, the button "3D" in "Mesh" does not create any 3D-elements. > > I fear that a geometry is needed. Or is there a manner to create a > volume mesh from a 2D-mesh? > > > > Many thanks for your help, > > > > Johannes_ACKVA > > > > _______________________________________________ > > gmsh mailing list > > [email protected] <mailto:[email protected]> > > http://onelab.info/mailman/listinfo/gmsh > _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
