[PedroC]

Hello. I am relatively new to ICEM and I've been searching similar cases on this forum for days with no luck. I'm using 12.1.

I have a problem whenever I try to create a prism layer on my tri mesh. My geometry consists of a rectangular farfield and the body is a train, which is almost touching the "ground" surface of the farfield. I mesh this 2D geometry with tetra and up to this point everything is wonderful and great (BTW it's a tri only and patch independant). Then I extrude the surface with the Extrude Mesh tool, since my solver needs a 3D mesh to work with. Now comes the problem. I want to create a prism layer all over my body to capture boundary layer effects. The problem is that the prism mesher doesn't do anything when I hit Compute. Through a variety of different combinations of meshing and extruding ways, I get one error or another. The most common error is:

shells 32350 and 29061 not consistently oriented

Followed by the not less popular:

expecting 2 shells on edge 36 39 found 3

After showing this messages hundreds of times and alternating one with another, the prism mesher seems to finish succesfully. It even makes the different iterations required to make you think that he is working. But when it's done, nothing has changed and no new volume part has been created. Sometimes eventhough no errors are displayed on the log, but still no prisms are created.

I think I've run every single tool on ICEM trying to find some mesh/geometry singularity, but I couldn't find the root of my problem. I'm attaching 2 pictures and a txt with my prism log so you can understand my problem better. Thanks in advance for your help and I hope someone can throw some light on this.