Andrey wrote: > Dear GMSH community! > > > Let’s consider the following geometry: > > Input data to GMSH is a triangulated sphere of radius=1. > > Each point of triangulation has constant characteristic length. > > > I pass triangulated sphere to GMSH in order to get meshed volume inside: > > > gmsh-win.exe -3 boundary.geo -o mesh.mesh -format mesh -order 1 -algo > iso -optimize > > > Then I consider two different cases (input geometry is the same, the > only difference is characteristic length): > > > 1) If characteristic length=0.025 – everything is OK. > > See attached input: boundary_good.zip and produced: sphere_good.png > > Output of quality for this case: > > Info : Opti : 0.00 < QUAL < 0.10 : 0 elements > > Info : Opti : 0.10 < QUAL < 0.20 : 0 elements > > Info : Opti : 0.20 < QUAL < 0.30 : 8 elements > > Info : Opti : 0.30 < QUAL < 0.40 : 113 elements > > Info : Opti : 0.40 < QUAL < 0.50 : 3134 elements > > Info : Opti : 0.50 < QUAL < 0.60 : 112218 elements > > Info : Opti : 0.60 < QUAL < 0.70 : 285051 elements > > Info : Opti : 0.70 < QUAL < 0.80 : 389672 elements > > Info : Opti : 0.80 < QUAL < 0.90 : 184604 elements > > Info : Opti : 0.90 < QUAL < 1.00 : 15858 elements > > 2) If characteristic length=0.05 – produced mesh is not correct. > > See attached input: boundary_bad.zip and produced: sphere_bad.png > > Output of quality for this case: > > Info : Opti : 0.00 < QUAL < 0.10 : 0 elements > > Info : Opti : 0.10 < QUAL < 0.20 : 2707 elements > > Info : Opti : 0.20 < QUAL < 0.30 : 2033 elements > > Info : Opti : 0.30 < QUAL < 0.40 : 923 elements > > Info : Opti : 0.40 < QUAL < 0.50 : 649 elements > > Info : Opti : 0.50 < QUAL < 0.60 : 670 elements > > Info : Opti : 0.60 < QUAL < 0.70 : 606 elements > > Info : Opti : 0.70 < QUAL < 0.80 : 425 elements > > Info : Opti : 0.80 < QUAL < 0.90 : 174 elements > > Info : Opti : 0.90 < QUAL < 1.00 : 15 elements > > > Summary: > > First case is more complex, because of larger amount of produced > tetrahedra and because 2D-frames (of input data) are also meshed by GMSH > (according to characteristic lengths). But first case is handled > correctly, the second - not. >
This is weird: I cannot reproduce the problem on my machine... Does it still happen with recent nightly snapshots? > > Ant suggestions? > > > Best regards, > > Andrey > > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > _______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
