I cannot open your file with my svn version... Error : Line Loop 17 is wrong Error : Line Loop 18 is wrong Error : Line Loop 19 is wrong Error : Line Loop 20 is wrong
Anyways, have you tried using the 'Layers' command in your extrusion? It will produce prisms. Unfortunately, there is also a known problem with extruded layers when refining: https://geuz.org/trac/gmsh/ticket/184 (gmsh:gmsh) -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rene Schneider Sent: Thursday, February 14, 2013 2:49 PM To: [email protected] Subject: [Gmsh] node positions on B-splines Hi First of all, thanks for providing this great software. I'm trying to mesh a 3D geometry defined by extruding B-spline segments, see attached example. I noticed that nodes accumulate close to the lines that originate from extruding the end-points of the B-splines, resulting in extremely thin surface triangles. Thus fairly bad tets are generated in the 3d mesh in these regions. Even worse: if the mesh is refined, the surface triangles are "sucked" into this region, degenerating to zero surface area. Correspondingly tets result, with zero volume. I presume this problem could result from an error in distance measurement on the surface. If I use splines instead of B-splines, the problem is gone. Any help is appreciated, I really need those B-splines. I'm using $ gmsh --version 2.6.1 under Linux. Rene _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
