Dear all, I'm kind of new user of Comsol. Any suggestion will be appreciated regarding to my question. I want to model fluid flow in annulus (between two cylinders) with the inter cyliner rotating with a given speed. The 2 ends of the annulus are the inlet and outlet. With either 5.4 or 5.3, I cannot find where to set that wall condition. The options under "moving wall" include "sliding wall" and "moving wall", but no "rotating wall". Somebody can point me to the right direction? thank you very much.
Chunlou