Meshing in tip clearance.
 

Hi all, I am doing compressor cfd analysis. I would like to know, how can I mesh in tip clearance. Tip clearance betwwen blade tip and casing is around 0.18 mm, and I have to also create interface (may be at 0.09 mm) within this distacnce to capture near wall boundary resolution. My worry is how can I specify parameters . Does anybody has idea?