Complex Geometry for Hex Mesh
 

Hello,

First of all, I am quite new to ICEM. I checked the tutorials, and a lot of threads here but based on these sources of information I could not find a solution.

About problem: I have to mesh complex geometry with hex-cells only. I got as well an old CFX mesh as a STL file of the geometry. As the basic shape is a ~25m radius sphere with a lot of rooms, pipes, doors etc. a meshing using the ICEM blocking methods seems to be too time-consuming. For first calculations with a tetraedrical mesh I used the volume mesh method and it worked perfectly. However, as I said, for a specific feature of our solver we need a hex-mesh of the geometry. So I tried to run the volume mesh method with cartesian mesh option. Basically the mesh looks acceptable. But at some positions especially at sharp interior edges of the geometry there are check mesh fails. Especially involving volume orientations. If I try to fix them ICEM claims that probably their quality is too bad to fix them.

Does anyone have experience with this problem? Is there a better way to do the meshing? Or do I really have to do the blocking for every room, which is part of the geometry?

Thank you a lot in advance!

Thomas