Rotating Radial Channel with Through Flow
I am trying to model a simple radial channel with rectangular cross-section that rotates about an axis with through flow using Caedium Professional. I obtained a solution with good convergence but the results are not what I expected from potential flow theory which gives a linear relative velocity distribution across the channel in the circumferential direction.
I am quite new to Caedium so it is likely me doing something wrong in the set-up process.
The channel is modeled in the XZ and YZ planes. I assigned water as a substance and specified the face at the inner radius as the inlet and the face at the outer radius as the outlet. The boundary conditions are the inlet volumetric flow and the angular velocity about the x-axis which I assigned to all of the walls. The flow rate should have been set high enough to prevent separation or recirculation.
Is this the correct approach? Any help would be appreciated.