I want to simulate centrifugal separation of two gases, Co2 and N2. The idea is when it rotate this mixture in a cylinder at an RPM, Co2 will move away from the axis(High molecular weight) and N2 with low molecular weight will stay near to the axis of rotation. Can anyone help me to model this?.

I have simulated this in Fluent with multi-species with moving reference frame (RPM=10000) but no results