[Gmsh] How to generate periodic grids when importing step geometry ?

[Bernd Hahnebach]

Hi Benedikt,

just for your information. AFAIK STEP does not support the OCCT  
BOOLEAN FRAGMENTS shapes like a CompSolid. Means if you use Boolean  
Fragments inside FreeCAD  (which is possible by GUI and Python) and  
use STEP to transform them to GMSH you will loose some smart  
informations like two solids sharing a face etc. Thus best is to use  
OCCTs native format BREP. Since FreeCAD and GMSH are both based on  
OCCT they both support it very well.

BTW: It is exactly what I did when developed FreeCADs GMSH mesh tool:  
export to BREP, write some geo file, run GMSH and read back an unv.


Ahh, never would have thought there is someone less than 500 m away  
who uses FreeCAD :-)  I'm in Räffelstrasse 32 :-)


cheers bernd



--- Ursprüngliche Nachricht ---
> Dear gmsh,
>
> assume I have created a geometry in FreeCAD,
>
> exported it as a STEP file and imported
>
> into gmsh.
>
> How do I ensure conformal boundary meshes
>
> for periodic analysis when I generate the mesh
>
> in gmsh ?
>
> 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,  
> benedikt.oswald at lspr.swiss
> ----------------------------------------------------------------------
> ------------------------------------------------
>
>
>