Hi Travis, solution a) should have worked. Can you send us your .geo file to check ? And can you try with with the Tetgen 3D meshing algorithm instead of netgen ?
Cheers, Dave -- David Colignon, Ph.D. Collaborateur Logistique du F.R.S.-FNRS CÉCI - Consortium des Équipements de Calcul Intensif ACE - Applied & Computational Electromagnetics Sart-Tilman B28 Université de Liège 4000 Liège - BELGIQUE Tél: +32 (0)4 366 37 32 Fax: +32 (0)4 366 29 10 WWW: http://hpc.montefiore.ulg.ac.be/ Agenda: http://www.google.com/calendar/embed?src=david.colignon%40gmail.com Travis Thompson wrote: > Hello. I have been working with Gmsh for a finite elements project at > Texas A&M university in college station, tx. > > I am new to Gmsh and have been stuck on a particular problem for a > while now; I was hoping maybe someone could shed some light on it. > The setup is fairly simple. I have a 3 dimensional rectangle which > completely contains another 3 dimensional object. > > The object inside the box is completely closed; i will refer to this > object as Object A. If I attach a volume element to object A and mesh > the box + object A everything works wonderfully. I get a nice 2d mesh > on the bounding box and a nice 3d mesh inside object A. > > The problem is that I need a 3d mesh inside the bounding box and i > want *no mesh* in the interior of object A (that is, I want to mesh > the complement of Object A with respect to the bounding box). > > What I have tried: > a) I have tried attaching a volume element to the ambient bounding box > and selecting Object A as 'a hole' > b) I have tried attaching a volume element to the bounding box and a > volume element to Object A with the intention of Deleting the volume > element attached to object A *after* computing the mesh. > > However both (a) and (b) lead to gmsh crashing (same error on both > windows and Linux versions) > The error is: > > ---------------------------- > Assertion Failed! > > Program: c:\program files\gmsh-2.2.4-Windows\gmsh.exe > File: tetgen.cxx > Line: 22506 > > Expression: matchflag == true > --------------------------- > > I would imagine that what I am trying to do is quite basic; ie: > meshing the complement of an object inside an ambient object. I have > been through the documentation but due to my lack of familiarity with > Gmsh I have failed to figure out a method. > > If anyone can shed any light on this I would greatly appreciate it! > > Thank you in advance! > > -Travis Thompson > Graduate Student > Dept of Mathematics, Texas A&M University > > _______________________________________________ > gmsh mailing list > [email protected] > http://www.geuz.org/mailman/listinfo/gmsh _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
