[Gmsh] Problem to create a 3d mesh for merged surfaces

Fri Jul 7 14:10:56 CEST 2017

Hi gmsh community;

I´m trying to define a 3d mesh of a merged .brep surfaces for my PhD, to use it into freefem++.When I set opencascade geometry kernel, at the first line ,  surface loop  creates duplicates entities, and the subsequent volume is defined with this entities. However, the 3d mesh is seems to be correct, but the 2d mesh has overlapping faces, and when import this into freefem I got errors.

http://onelab.info/pipermail/gmsh/2014/009368.html

If I don´t use the opencascade kernel, The 2d mesh was made properly, however when apply the 3d mesh button, gmsh gives the error ".
Info    : Meshing 3D...
Info    : Delaunay Meshing 1 volumes with 1 connected components
Info    : Meshing volume 1 (Delaunay)
Info    : 3209 points 15963 edges and 6592 faces in the initial mesh
Info    : Found region 1
Info    : 0 points created - Worst tet radius is 7.55082e+16 (PTS removed 0 0)
Info    : 0 points created - Worst tet radius is 8.91669 (PTS removed 0 500)
Info    : 0 points created - Worst tet radius is 4.28138 (PTS removed 0 1000)
Info    : 0 points created - Worst tet radius is 2.71306 (PTS removed 0 1500)
Info    : 0 points created - Worst tet radius is 2.03135 (PTS removed 0 2000)
Info    : 0 points created - Worst tet radius is 1.60219 (PTS removed 0 2500)
Info    : 0 points created - Worst tet radius is 1.32663 (PTS removed 0 3000)
Info    : 0 points created - Worst tet radius is 1.14246 (PTS removed 3 3497)
Info    : 3D point insertion terminated (3209 points created):
Info    :  - 0 Delaunay cavities modified for star shapeness
Info    :  - 3973 points could not be inserted
Info    :  - 9413 tetrahedra created in 0.09375 sec. (100405 tets/sec.)
Info    : Done meshing 3D (0.515625 s)
Error   : OCC Project Point on Surface FAIL
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.75
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.5625
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.421875
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.316406
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.237305
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.177979
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.133484
Info    : point 4.156 9.4 8.16 : Relaxation factor = 0.100113

When I apply the Coherence Mesh; I got the error "No tethraedra in region 10".

Thank you all in advance.

Best Regards
Jacob

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