HI I want to use netgen for
 

HI

I want to use netgen for meshing my geometry. How can i refine my mesh locally? I did not find any instructions of doing this. Perhaps somebody can help me. I know that i have to use "Refinement Dialog". But what i exactly have to do for example to refine the volumemesh of a cylinder to the jacket( i hope this is the right word in english) i dont know.

My second question: Is it advisable to use netgen for meshing geometry to solve CFD-Problems?

Thanks.