[ApoaJonnz]

Hey,

I'm kind of lost with a problem.
I'm meshing a geometry after imported via CAD-Interface from Siemens NX.
After Octree-Meshing the Tetra-Mesh has a quality over 0.3 everywhere.

I then post-inflate prisms and something weird happens. In an area in the middle of a big flat surface (ovally shaped) the prisms fail and only seven of the ten layers are formed. As a result a cluster of Tets is formed above them which have bad quality and cannot be smoothed acceptably.
The Tetra-Mesh before the inflation shows no sign of differing quality or problems in this area (or at least none that I can recognize). I'm simply clueless why it happens.

Did anyone experience something similar or has an idea why this happens and how it could be solved?

I attached an image how the mesh looks after inflation in the particular area.

My prism-parameters are:
Growth law: exponential
Initial height: 0.06
Height ratio: 1.15
Number of layers: 10
Total height: 1.21...
Fix marching direction: off (also tried on, didnt' help)
Min prism quality: 0.01 (also tried 0.001 and 0.1, didnt' help)
Fillet ratio: 0.1
Max prism angle: 180
Max height over base: -
Prism height limit factor: 0 (also tried 1, didnt' help)
Ratio multiplier: -
Smoothing Options:
Number of surface smoothing steps: 6
Triangle quality type: inscribed_area (also tried Laplace with different Ortho weights and directional smoothing, didnt' help)
Nr of vol smoothing steps: 10
Max directional smoothing steps: 0
First layer smoothing steps: 1

[ApoaJonnz]

So, after three days of trying I found the solution right after posting this thread...

I was an issue with the CAD-Interface. I don't fully understand it yet, but I disabled the import of volume bodies and lines from CAD (as I only need surfaces anyway) and this somehow solved the issue.