> On 10 Oct 2017, at 13:16, Benedikt Oswald <[email protected]> wrote:
>
> Dear gmsh,
>
> assume I have created a geometry in FreeCAD,
>
> exported it as a STEP file and imported
>
> into gmsh.
If you use FreeCAD, import directly the .brep file in Gmsh - it's much more
efficient than STEP, and you will avoid all translation errors (as .brep is the
native OpenCASCADE format, used directly by both FreeCAD and Gmsh).
>
> How do I ensure conformal boundary meshes
>
> for periodic analysis when I generate the mesh
>
> in gmsh ?
>
Just as you would do it for a "normal" Gmsh geometry, i.e., with "Periodic
Surface" constraints.
For example if the periodic faces 1 and 2 are translated by 3 in the z
direction, your geo file could look something like this:
Merge "file.brep";
Periodic Surface {1} = {2} Translate {0,0,3};
PS : with recent versions of Gmsh you can also directly create quite
complicated geometries directly in Gmsh, with SetFactory("OpenCASCADE"). Or you
can modify geometries created w.g. with FreeCAD. See gmsh/demos/boolean for
examples, in particular demos/boolean/import.geo.
> Thanks for some hints,
>
> Benedikt
>
>
> --
> ----------------------------------------------------------------------------------------------------------------------
> Dr. sc. techn. Benedikt Oswald - first engineer - LSPR AG - phone +41 43 366
> 90 74
> Grubenstrasse 9, CH-8045 Zürich, [email protected]
> ----------------------------------------------------------------------------------------------------------------------
>
>
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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