Dear Christophe, thank you very much for your reply. I downloaded the latest snapshot and now I can get the mesh as expected. I will continue my testing.
One more question: I have seen that with Gmsh 4 you have introduced many modifications to the mesh generation algorithms. Could you tell me the section where the pyramids are added and "inflated" inside the domain? In a previous version (I think 2.x) it was in "MeshDelaunayVolumeTetgen" in meshGRegion.cpp, but now, I cannot find the relevant section in the new implementation. In the old code I introduced a modification (after a discussion with prof. Remacle) to this part and would like to try to replicate it also in the latest version of Gmsh. Thanks in advance, Simone G. ________________________________ From: Christophe Geuzaine <cgeuza...@uliege.be> Sent: Monday, November 12, 2018 3:33:25 PM To: Simone GREMMO Cc: gmsh@onelab.info Subject: Re: [Gmsh] Gmsh-4.0.4 Volume mesh issue Dear Simone, Indeed, Gmsh 4.0.0 -> 4.0.4 do not have the ability to automatically create hybrid tetrahedral+pyramidal meshes (your surface contains quadrangles). The latest snapshot (future Gmsh 4.0.5 or Gmsh 4.1) has a new algorithm to generate such meshes, similar but more general to what we did in Gmsh 3. Give it a try and let us know how it works out for you? Christophe > On 12 Nov 2018, at 14:38, Simone GREMMO <simone.gre...@umons.ac.be> wrote: > > Dear all, > I have just downloaded the last version of Gmsh (4.0.4), but I am facing a > problem with the generation of a "simple" volume mesh. > > I would like to mesh a volume delimited by a surface mesh in .msh format, but > it looks like Gmsh cannot create the volume mesh. > Error Message is : > ..... > Info : Boundary Recovery... > Info : Writing to GRegion... > Info : Reconstruct time : 0.116395 sec > Error : No tetrahedra in region 5 > Info : 3D point insertion terminated (3195 points created): > Info : - 0 Delaunay cavities modified for star shapeness > Info : - 0 points could not be inserted > Info : - 0 tetrahedra created in 1.6e-05 sec. (0 tets/sec.) > Error : No tetrahedra in region 5 > Info : Done meshing 3D (0.133228 s) > Info : 4857 vertices 6617 elements > Error : ------------------------------ > Error : Mesh generation error summary > Error : 0 warnings > Error : 2 errors > Error : Check the full log for details > Error : ------------------------------ > > I am attaching the .geo file I have created as well as the surface mesh I > used. To launch the mesh generation I run the command: > gmsh-4.0.4 createGeom.geo -3 -o volumeMesh.msh > > Note that the same test case is successfully meshed using Gmsh version 3.0.6. > > Do you have any suggestion on how to solve the problem? > Is it possible that the surface mesh, containing both triangles and > quadrangles is at the origin of the problem? > > Thanks in advance for your suggestions. > Regards, > Simone G. > > <createGeom.geo><surfaceMesh.msh>_______________________________________________ > gmsh mailing list > gmsh@onelab.info > http://onelab.info/mailman/listinfo/gmsh gmsh Info Page<http://onelab.info/mailman/listinfo/gmsh> onelab.info Gmsh is a free 3D finite element mesh generator with built-in pre- and post-processing facilities. This list is for questions and discussions about Gmsh features, resources, bugs, and so forth. Useful links: Gmsh homepage (for documentation, downloads, etc.); gmsh-announce mailing list (for announcements about new Gmsh releases and major bug fixes - you probably want to subscribe to that, as well) — Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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