On Thu, Jan 16, 2020 at 1:21 AM Ramakrishnan Thirumalaisamy < thirumalaisamyr...@gmail.com> wrote:
> Dear libmesh users, > > I want to create sphere with tetrahedral elements. I came across this > function MeshTools::Generation::build_square. But this function supports > only HEX8/27 for 3D. Is there any other functions in libmesh that I could > use to generate sphere with tetrahedral elements? > Hi Ramakrishnan, Your email mentions both spheres and build_square, but I'm assuming what you're really after is spheres. The implementation doesn't currently exist, but you could do something similar to what's currently done in the build_cube() case when Tets are selected. That is, first a mesh of hexahedra is created and then each hex is split into IIRC 24 tets. This isn't the most economical splitting but it is very "symmetric" and therefore easy to make the split elements line up consistently. This splitting also introduces new mid-face nodes, which could be "snapped" to the sphere surface as necessary. Another option would be to configure/build libmesh with the --disable-strict-lgpl option and then use the libmesh Tetgen interfaces to create a Delaunay mesh of the sphere. If you end up implementing either of those, it would be great if you could contribute them back as either library code or possibly an augmented miscellaneous_ex6. Note that libmesh also supports reading several different mesh file formats, so if you generate a sphere mesh in e.g. Gmsh, you would be able to read it in without doing any major programming yourself... -- John _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
