[Gmsh] 3d Delaunay Mesh

[Juan Sanchez]

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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