On 14/11/15 19:57, David Knezevic wrote: > On Sat, Nov 14, 2015 at 1:39 PM, John Peterson <jwpeter...@gmail.com > <mailto:jwpeter...@gmail.com>> wrote: > > > > > On Nov 14, 2015, at 11:21 AM, Torquil Macdonald Sørensen > <torq...@gmail.com <mailto:torq...@gmail.com>> wrote: > > > > Hi! > > > > I'm a libmesh beginner, and I seem to be having some trouble with > > importing meshes created by GMSH 2.11.0. In GMSH, I create a > simple unit > > cube, and define faces and a volume. Then I create a 3d mesh and > save in > > the MSH format (ASCII version 2). I have attached the file cube.msh. > > > > When I run the simple attached libmesh program import_gmsh.cpp, > I get > > the following error message: > > > > Cannot handle meshes with dimension mismatch greater than 1. > > This error means that your mesh has 1, 2, and 3D elements in it... > not something our Gmsh reader is currently able to handle. We > assume that lower dimensional elements are used to define boundary > conditions, but don't yet handle reading edge-based (?) BCs. This > could probably be fixed. > > > > I haven't used GMSH for a long time, but IIRC by default it includes > out all the lines and surfaces you used to build up your 3D geometry > in the mesh. This is why you can end up with 1D elements, even if you > didn't want the 1D elements in your mesh. There is some command to > suppress that behavior, but I don't remember what it is. I think it's > related to the "physical" entities in GMSH. >
Thanks! It was necessary to define a volume physical group in the GMSH geometry. When saving to MSH format, only the meshing of physical groups is exported (if they exist), and by defining a volume physical group it lead to a MSH file containing only 3d elements. Now and can import to libmesh and print mesh information properly. Best regards, Torquil Sørensen ------------------------------------------------------------------------------ _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
