> On 21 Nov 2019, at 19:01, Francisco Pena <[email protected]> wrote:
>
> Hi,
>
> I would like to generate a regular mesh of a cube composed only by tetrahedra.
>
> When I use Transfinite Volume (see attached file .geo) I end up with a
> tetrahedral mesh, but the physical entities that define the outer surfaces
> are applied in triangles that are incompatible with the tetrahedra (see
> attached file .png).
Indeed, this is a longstanding limitation of the (non-recombined) Transfinite
Volume algorithm. We need to fix this... In the meantime, you can
- either use (non-recombined) Extrusion with Layers
- or manually set the interpolation corners in the Transfinite Surfaces
(Transfinite Surface{x} = {a,b,c,d};) that do not match, to force the
orientation.
Christophe
>
> With Recombine, I can create a hexahedral mesh but, according to
> http://onelab.info/pipermail/gmsh/2011/006408.html, there is no easy way to
> convert it into a tetrahedral mesh .
>
> Finally, the method TransQuadTri generates not only tetrahedra but also
> pyramids and prisms.
> <incompatible.png><at2.geo>_______________________________________________
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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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