Unstructured mesh
 

I tried to make and unstructured mesh with proam, but I don't understand how it works. It's possible avoid to have trimmed cells in a comples geometry model? Thanks for help

Re: Unstructured mesh
 

You can produce an all tet model if you want or interior tets with a near wall prism layer. If you do not want all tets, then you must have a combination of hex and trim cells. Those are the only 2 choices.

Re: Unstructured mesh
 

or a combination of hexas, pyramids, tetras and prisms which is called the hybrid method