I’m wondering if anyone has tried using tetrahedral meshing for external flow? When I was doing hex meshing experiments I poked at it. I found this one post that indicated layer generation is easier.
In CAD I created a solid volume around my part and then did a boolean to remove the overlapping solids. From there I was able to generate a good tet mesh of the volume, but BL generation always failed. Surface definition is really smooth though. Project here.