Hi,
A couple of pointers based on the setup:
- Since we have very high velocities, the default mesh settings are likely going to result in y+ values which are too large (see how to optimize the layer settings here)
- The velocities due to the velocity inlet are much larger than the velocity of the rotating cylinder (> 100x for 100 rad/s and > 10000x for 1 rad/s). With that being said, I would anticipate small changes in the flow field, but nothing major.
In any case, obtaining an optimized mesh would help to see finer differences more clearly.
Cheers