Re: [petsc-users] DMPlex and Gmsh

[Blaise Bourdin]

Hi, I think that you need to use the magical keyword “-dm_plex_gmsh_mark_vertices” for that Blaise On Nov 8, 2023, at 1:13 PM, Sharan Roongta <s.roon...@mpie.de> wrote: Caution: External email.  Dear Petsc team,   I want to load a .msh file generated using Gmsh software into the DMPlex object. There are several things I would want to clarify, but I would like to start with “Physical tags”.   If I have defined “Physical Points”, “Physical Surface”, and “Physical Volume” in my .geo file, I get the physical tags in the “.msh” file. When I load this mesh in DMPlex, and view the DM:   call DMView(globalMesh, PETSC_VIEWER_STDOUT_WORLD,err_PETSc)   CHKERRQ(err_PETSc)   This is the output I get:   DM Object: n/a 1 MPI process   type: plex n/a in 3 dimensions:   Number of 0-cells per rank: 14   Number of 1-cells per rank: 49   Number of 2-cells per rank: 60   Number of 3-cells per rank: 24 Labels:   celltype: 4 strata with value/size (0 (14), 6 (24), 3 (60), 1 (49))   depth: 4 strata with value/size (0 (14), 1 (49), 2 (60), 3 (24))   Cell Sets: 1 strata with value/size (8 (24))   Face Sets: 6 strata with value/size (2 (4), 3 (4), 4 (4), 5 (4), 6 (4), 7 (4)) I was expecting to get the “Node Sets” or “Vertex Sets” also. Is my assumption wrong? If yes, then how can one figure out the boundary nodes and their tags where I want to apply certain boundary conditions? Currently we apply boundary conditions on faces, therefore “Face Sets” was enough. But now we want to apply displacements on certain boundary nodes.   I have also attached the .geo and .msh file (hope you can open it) The Petsc version I am using is 3.18.6. Thanks and Regards, Sharan Roongta   ----------------------------------------------- Max-Planck-Institut für Eisenforschung GmbH  Max-Planck-Straße 1  D-40237 Düsseldorf  Handelsregister B 2533  Amtsgericht Düsseldorf      Geschäftsführung  Prof. Dr. Gerhard Dehm  Prof. Dr. Jörg Neugebauer  Prof. Dr. Dierk Raabe  Dr. Kai de Weldige  Ust.-Id.-Nr.: DE 11 93 58 514  Steuernummer: 105 5891 1000  -------------------------------------------------  Please consider that invitations and e-mails of our institute are  only valid if they end with …@mpie.de.  If you are not sure of the validity please contact r...@mpie.de Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails  aus unserem Haus nur mit der Endung …@mpie.de gültig sind.  In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de   ------------------------------------------------- Stay up to date and follow us on LinkedIn, Twitter and YouTube. Max-Planck-Institut für Eisenforschung GmbH Max-Planck-Straße 1 D-40237 Düsseldorf   Handelsregister B 2533  Amtsgericht Düsseldorf   Geschäftsführung Prof. Dr. Gerhard Dehm Prof. Dr. Jörg Neugebauer Prof. Dr. Dierk Raabe Dr. Kai de Weldige   Ust.-Id.-Nr.: DE 11 93 58 514  Steuernummer: 105 5891 1000 Please consider that invitations and e-mails of our institute are  only valid if they end with …@mpie.de.  If you are not sure of the validity please contact r...@mpie.de Bitte beachten Sie, dass Einladungen zu Veranstaltungen und E-Mails aus unserem Haus nur mit der Endung …@mpie.de gültig sind.  In Zweifelsfällen wenden Sie sich bitte an r...@mpie.de ------------------------------------------------- <cube_check.msh><cube_check.geo> —  Canada Research Chair in Mathematical and Computational Aspects of Solid Mechanics (Tier 1) Professor, Department of Mathematics & Statistics Hamilton Hall room 409A, McMaster University 1280 Main Street West, Hamilton, Ontario L8S 4K1, Canada  https://www.math.mcmaster.ca/bourdin | +1 (905) 525 9140 ext. 27243