[JCBB]

Hi,

i'm currently trying to model the airflow over a rotating ring and experiencing an issue as pictured. (The airflow is right-to-left, the boundary of the rotational domain can be seen clearly.)

Having defined the rotating cell zone with 'Mesh motion' condition and plotting a velocity contour over the model, it appears that the fluid (air) within the zone is not behaving as i would expect.

I am a fairly new user and i appreciate there are nuances to the program, but this does not look realistic. Some input from more experienced users would be much appreciated.

Some things which may be useful:
1. The model is k-epsilon, realizable with scalable wall function
2. Transient simulation with time step of 0.02s
3. Ring rotational velocity of 3000rpm and a uniform air velocity over the ring of 15m/s
4.The wall of the rotational domain boundary is set as "moving wall", matching the speed of the ring, however the results are similar even with a stationary wall.

All input is appreciated.