[Gmsh] 3d Delaunay Mesh

[Christophe Geuzaine]

Hi Juan,

This is expected: to get a 3D mesh that satisfies the Delaunay criterion we would need to modify the surface mesh - this is something we try hard to avoid.

Christophe


> On 14 Jun 2020, at 20:17, Juan Sanchez <juan.e.sanchez at gmail.com> wrote:
> 
> Hello,
> 
> I am having a hard time getting a 3d delaunay mesh, so that the circumcenters of the tetrahedra are inside the element.
> 
> In my simulator, I am seeing that about 50% of the elements are not delaunay if:
> Mesh.CharacteristicLengthExtendFromBoundary = 1;
> 
> and about 90% are not Delaunay if:
> Mesh.CharacteristicLengthExtendFromBoundary = 0;
> 
> Is there a way to improve this when running the tool from the command line or with an option in the geo file?
> 
> I am using:
> /Applications/Gmsh.app/Contents/MacOS/gmsh -format msh2 -3  3dblock.geo
> 
> with version 4.5.6 on macOS 10.14.6 (Mojave).
> 
> Regards,
> 
> Juan
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine