Le 1 sept. 2011 à 14:11, Cristóbal Bertoglio B. a écrit : > Hi > > so I re-run the meshing in old testcases and the Delaunay (plus the > two types of optimization) gives always better meshes than in the > frontal case, and without tetras with the 4 vertices on the external > surface. > > The price is that it creates much more nodes, but the real problem is > it creates also additional triangles on the surface (what it is not > convenient for me since I'm doing FSI). > > Hence, it is possible to tell gmsh not to create additional triangles > on the surface ? (if yes this would be already great). >
Only using the frontal mesher, sorry JF > Thanks > > Cristobal. > > 2011/9/1 Christophe Geuzaine <[email protected]>: >> >> On 31 Aug 2011, at 14:13, Cristóbal Bertoglio B. wrote: >> >>> Hi >>> >>> I'm trying to construct a volumetric mesh from an already existing surface >>> mesh. >>> >>> In past tests I was using the Frontal algorithm (+ netgen >>> optimization) since it gave me less nodes, no surface triangles and no >>> tetrahedra with the 4 nodes on the external surface. However, when >>> running it for this example gives several errors of type I indicate >>> bellow. >>> >>> In contrast, Algorithm 1 works perfectly (however it produces more >>> nodes, create surface triangles and give me tetrahedra with the 4 >>> nodes on the external surface, all things that I want to avoid). >>> >>> Does some know the reason why Delaunay works and Frontal doesn't ? >>> >> >> Hi Cristobal, >> >> The frontal algorithm is definitely less robust than the Delaunay. Do you >> still get bad tets if you optimize your mesh ("Optimize" and/or "Optimize >> Netgen") in the mesh menu? >> >> >> >>> The mesh is also attached. >>> >>> Thanks in advance, >>> >>> Cristobal. >>> >>> ------------- >>> >>> Info : Meshing volume 0 (Frontal) >>> Info : Region 0 Face 1, 3 intersect >>> Info : CalcLocalH: 13932 Points 0 Elements 27860 Surface Elements >>> Info : Check subdomain 1 / 1 >>> Info : 27860 open elements >>> Error : ERROR: Edge 20 - 33 multiple times in surface mesh >>> ...... >>> Error : ERROR: Surface mesh not consistent >>> Error : ERROR: Stop meshing since surface mesh not consistent >>> Info : Mesh 3D complete (1.84027 s) >>> Info : 13932 vertices 27860 elements >>> Error : ------------------------------ >>> Error : Mesh generation error summary >>> Error : 0 warnings >>> Error : 201 errors >>> Error : Check the full log for details >>> <aorta.stl>_______________________________________________ >>> 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 ------------------------------------------------------------------ Prof. Jean-Francois Remacle Universite catholique de Louvain (UCL) Ecole Polytechnique de Louvain (EPL) - Louvain School of Engineering Institute of Mechanics, Materials and Civil Engineering (iMMC) Center for Systems Engineering and Applied Mechanics (CESAME) Tel : +32-10-472352 -- Mobile : +32-473-909930
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