[Gmsh] topography issues

[Octavio Castillo Reyes]

Dear all,

I'm interested too. My domains are composed 3, 4 or 5 materials (maybe
more) where each interface might include a topography. For instance, do you
know if is possible include another layer to the model proposed by Riad
Hassani?

Any idea?

Best regards

O.

On Fri, Sep 21, 2018 at 12:37 PM Riad HASSANI <Riad.Hassani at unice.fr> wrote:

> Hi Stephanie,
>
> the only trick I had found at the time is in three steps (there may be
> more direct solutions, if so, I'm interested!):
>
> 1) mesh only the "skin" of your domain (2D mesh), save it in a .msh file
> 2) move the nodes of the surface to match with your topography (use an
> external program that reads the .msh, interpolates the topography on the
> appropriate faces and rewrites your .msh).
> 3) in a .geo file, merge this new .msh, define the volume and then mesh it
> (3D mesh) (for example, if the initial domain has 6 faces : Merge
> "skin_modified.msh"; Surface Loop(1) = {1,2,3,4,5,6}; Volume(1)={1}; )
>
> Best,
>
> Riad
>
>
> Le 21 sept. 2018 à 02:12, Stephanie Jarvis <Stephanie.Jarvis at colorado.edu>
> a écrit :
>
> Hello,
>
> Can gmsh can handle topography? I see this has been asked several times
> but I can't find a resolution. I have surveyed grid points from a hillslope
> surface that I need to create a 3D mesh for (top of the box is the
> hillslope topography, bottom is flat extending into the surface). I've
> tried embedding the points into a surface I create around them, using Point
> In Surface, but the points mesh as holes (if they're below that surface) or
> in the air by themselves (if they're above)--there is no interpolation
> between them. I've also tried several variations of lines and splines
> connecting the points, but I can't get that to mesh successfully.
> Plugin(Tetrahedralize) looks promising, but it's unclear to me how to use
> it--is it possible to get a "View" out of a bunch of points?  Or do I need
> to create an interpolated surface outside of gmsh and bring that in to mesh?
>
> Thank you!
> Stephanie
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>
> -----------------------------------------------------------------
> Riad HASSANI
> GéoAzur
> Université Nice-Sophia Antipolis
> 250 rue Albert Einstein
> Sophia Antipolis
> 06560 Valbonne - France
> tel. : 33 (0) 4 83 61 86 71 / 33 (0) 4 92 07 65 89
>
>
>
>
>
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