[Gmsh] Possible Error in Tetrahedral Meshing

[Christophe Geuzaine]

> On 8 Apr 2019, at 12:47, Jackman, K, Dr [kjackman at sun.ac.za] <kjackman at sun.ac.za> wrote:
> 
> To Whom It May Concern,
> 
> I have noticed some errors in the tetrahedral meshes, generated by Gmsh (both v3.0.6 and v4.2.2). Under certain circumstances, e.g. volumes with holes, some tetrahedron elements do not align with adjacent tetrahedrons. An example is attached that demonstrates this error, including images that show the location of the edges that do not connect.
> 
> I have tried several geometric examples, including meshing algorithms (surface and volume), but this does not fix the problem. The attached example seems to work when selecting “Mesh.Algorithm = 2;”, but this is not always the case for other geometries.
> 
> Hopefully, this is just a simple mistake in my geometry file.

The file you sent meshes fine here will all the algorithms. Can you send the .msh file that you think is wrong?

Christophe

> 
> Best regards,
> Kyle
> 
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine