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Free edges/faces appear after using Tetra remesh

I was wondering why I get some messed up mesh (and consequently some free faces flying around, marked in the screenshot) when I use tetra remesh to take care of tetra collapse and other element check factors. I need to mesh the transition layer you see in the attached screenshots. When I tetramesh it, it's ok and no free edges/faces. But after remeshing the tetramesh locations with problematic tetra collapse, I end up with some weird elements protruding to others and some free edges/faces that even equivalence couldn't get rid of them!

Any help/idea is greatly appreciated. Also let me know if you know a better way to mesh this transition than tetramesh (the area of the inner squares are 1/4 of outer squares).

Thanks a lot,

Maysam

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Rahul Rajan_21763

Could you share us HM file?I believe you are aware hex mesh transition.

Altair Forum User

Hi,

Are you using partial remeshing? I remember I encountered similar problems when only remeshing part of my mesh. The problem is gone once remesh the entire mesh.

Cheers,

Wensong

maysam

Could you share us HM file?I believe you are aware hex mesh transition.

Yes Rahul, I know about hexa mesh transition but it needed more preparation also the mesh is not in a critical location and only will transfer the stresses/strain so I decided to go for tetra. But you're right hexa transition is much better and more reliable.

maysam

Hi,

Are you using partial remeshing? I remember I encountered similar problems when only remeshing part of my mesh. The problem is gone once remesh the entire mesh.

Cheers,

Wensong

Exactly!! The partial remeshing brings up the problem. I just remeshed the whole part again and it went ok but the moment I try to fix the problematic elements (like tetra collapse or aspect ratio) by remeshing them, it just messes everything up again! I think I finally go with Rahul's idea of doing it with hexa mesh.