On Wed, Nov 28, 2018 at 3:58 PM Amneet Bhalla <mail2amn...@gmail.com> wrote:
> Hi Folks, > > I have a question about using 1D mesh (of an immersed structure) in 2D > (fluid domain) simulation. > I am importing GMSH file to read linear elements (EDGE2) making the surface > of a circle, such that I get > > mesh.read_mesh(gmsh_filename); > and > int dim = mesh.mesh_dimension; // dim == 1 > > In my simulation I want to enquire the orientation of the normal vector of > the edge elements. In libMesh, the "normals" are always relative to the "face" of the element (i.e. are computed by FE::reinit(elem, side), so in 1D the normals are (perhaps paradoxically) tangential to the element itself. If you are after a vector which is perpendicular to a given 1D element (assuming it's not the side of a 2D parent element) you may be best of just calculating it yourself as I don't think there's currently anything in the library that does this. -- John _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
