In your geo file, you can check orientation of boundary normals by adding Geometry.Normals = 100; // adjust 100 if needed
Then check that all normals are pointing outward. If some surface has opposite normal, then flip sign for example, if Line Loop(53) = {17, 18, -1, -16}; Ruled Surface(54) = {53}; this surface has wrong normal, define it as Ruled Surface(54) = {-53}; I think fixing this orientation should fix your issue. best praveen > On 09-Mar-2021, at 11:03 PM, krishan...@gmail.com <krishanu.se...@gmail.com> > wrote: > > > I am wondering what meshing software produces output files that would work > best with deal.ii. I have tried Gmsh, but it seems when this mesh (generated > by Gmsh) is imported in deal.ii, it is facing the issue of negative volume > fraction of a cell (could be because of the order of nodes written in Gmsh?). > Any suggestion about any other meshing software that could be used which > would avoid this issue? > > Thanks -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/A2CB718D-8AAD-40BE-9589-780582A67D67%40gmail.com.