Hi, AFAIK in Elmer you cannot assign a material to a surface in a 3D simulation, so you need those very flat volumes. There is a 3D meshing algorithm in gmsh (MMG3D) which in principle allows anisotropic mesh width. I have not succeeded in the past to get it working for a similar problem, as it was not available for volumes with internal boundaries. See the following post from the mailing list: http://www.geuz.org/pipermail/gmsh/2013/008379.html. This is a year ago, however, and things might have evolved since then.
@Christophe: Have they…? ;) HTH, Matthias Von: Drew D [mailto:[email protected]] Gesendet: Montag, 6. Oktober 2014 14:52 An: Christophe Geuzaine Cc: [email protected] Betreff: Re: [Gmsh] Meshing stackup with thin & thick layers Christophe, Thanks for the response. Don't I need to treat them as volumes so that I can assign them different materials in my solver? I'm using Elmer, btw. Drew On Mon, Oct 6, 2014 at 4:16 AM, Christophe Geuzaine <[email protected]<mailto:[email protected]>> wrote: On 01 Oct 2014, at 22:23, Drew D <[email protected]<mailto:[email protected]>> wrote: > I have a composite stackup with alternating thin & thick layers. The thick > ones are are rougly 10x the thickness of the thin ones, and the aspect ratio > is on the order of 100:1. The mesh for something like this is always huge. Is > there a way to treat the thin layers as 2D shells, while keeping the thicker > ones 3D? The model is being exported as a STEP file and brought into Gmsh. > Just include the surfaces in your model; Gmsh generates conformal meshes so this internal surface can then be treated as a thin layer in your solver. If you need duplicated nodes on the surface (which Gmsh normally does not generate), you can run Plugin(Crack) on the resulting mesh. > Thanks, > Drew > _______________________________________________ > gmsh mailing list > [email protected]<mailto:[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 _____________________________________________________________________ ERBE Elektromedizin GmbH Firmensitz: 72072 Tuebingen Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede Registergericht: Stuttgart HRB 380137
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