Problem in surface meshing at edges/boundaries
 

Hi:

I am trying to make my first mesh in Ansys ICEM for a couple of weeks. I am trying tetra mesh.

I am facing different problems at different times during meshing.

sometimes volume mesh created but shell mesh on the body not visible.

Now I have problem that meshing at boundaries/edges of the boundary are like that in attached pic.

Please suggest how can I get rid off this situation.

Regards

SO you have 2 problems...

1) shell mesh not always visible... This can happen if the volume mesh is the same on both sides. ICEM CFD thinks it is doing you a favor by removing junk surfaces... This is really a symptom of leakage. You could patch the holes, or you could go to mesh (tab) => Params by parts and turn on the "internal wall" setting so it won't delete these elements... You may still need to patch the hole at the mesh level (look for single edges) and then run delaunay to refill.

2) the crumbling mesh at the trailing edge... This is because you are using the octree mesher and your mesh size is not sufficient to capture your trailing edge. It thinks that the edge must not be important or you would have sized the mesh more appropriately... Two fixes... 1) If you want finer mesh on that edge, just set a smaller size on the trailing edge surface. 2) if you don't want finer mesh in that area, you just don't want it to crumble, then use "thin cuts". Check the help for more on how to set that up...

Best regards,

Thanks your reply. I will try to do as you suggest.