Have a look at the new boolean examples, e.g. http://gitlab.onelab.info/gmsh/gmsh/blob/master/demos/boolean/compsolid.geo http://gitlab.onelab.info/gmsh/gmsh/blob/master/demos/boolean/compsolid2.geo
BooleanFragments does exactly what you need. > On 3 May 2017, at 10:14, Zenker, Dr. Matthias <[email protected]> > wrote: > > Hi, > > I would also be interested in that functionality. It would resolve the old > “duplicated surfaces” problem that forced me (and others) to leave gmsh and > do the meshing with Salomé, even though IMHO gmsh does a better job > especially in 3D meshing – in Salomé, only netgen is available as 3D > algorithm in the free version. > BTW there seems to be a macro permitting to use gmsh in Salomé, see this post > at the Salomé forum: > http://salome-platform.org/forum/forum_12/953948027#494327180 > I haven’t tested it, though. > To export a geometry from Salomé to gmsh, I have sometimes had success using > brep format. > > Matthias > > Von: andrew [mailto:[email protected]] > Gesendet: Dienstag, 2. Mai 2017 19:58 > An: [email protected] > Betreff: [Gmsh] boolean partitioning > > > hi, > > In Salome which uses the opencascade model there is a Boolean operation > called partition. With this you can create a solid from two others but with a > shared face. A usage of that is the creation of meshes with internal walls in > it with zero thickness aka 'baffles'. Is there a procedure in gmsh that can > give the same results given that it has implemented the same opencascade > model? Obviously there is a way to have such results if you give the precise > geometry but sometimes it is very difficult to cut geometries and it is > easier if gmsh could do that. > > Attached is an image of a mesh with internal baffles created with > partitioning and the geometry that created it. I would prefer t if gmsh could > do the meshing but I haven't found a way to load the geometry to gmsh from > Salome. > > kind regards > > Andrew > > > Erbe Elektromedizin GmbH Firmensitz: 72072 Tuebingen Geschaeftsfuehrer: > Christian O. Erbe, Reiner Thede Registergericht: Stuttgart HRB 380137 > > _______________________________________________ > gmsh mailing list > [email protected] > http://onelab.info/mailman/listinfo/gmsh -- Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine Free software: http://gmsh.info | http://getdp.info | http://onelab.info _______________________________________________ gmsh mailing list [email protected] http://onelab.info/mailman/listinfo/gmsh
