[Gmsh] Meshing stackup with thin & thick layers

Drew D drewd423 at gmail.com
Tue Oct 7 14:37:11 CEST 2014


Thanks for the response, Dr. Zenker. So it doesn't sound like there is a
good way to do what I want currently?

Drew

On Tue, Oct 7, 2014 at 4:14 AM, Zenker, Dr. Matthias <
Matthias.Zenker at erbe-med.com> wrote:

>  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:drewd423 at gmail.com]
> *Gesendet:* Montag, 6. Oktober 2014 14:52
> *An:* Christophe Geuzaine
> *Cc:* gmsh at geuz.org
> *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 <cgeuzaine at ulg.ac.be>
> wrote:
>
>
> On 01 Oct 2014, at 22:23, Drew D <drewd423 at gmail.com> 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
> > gmsh at geuz.org
> > 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
>
>
>
>
>
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