[Abhya]

Hi everyone,

I'm performing the CFD analysis of a demo fan(centrifugal .. the fan blade is simplified to cylindrical disc! ). The fan is axisymmetric with a a period of 90deg angle

I'm modeling the fan rpm using "Multiple reference frame". I
I was hoping the fan quarter model (with the cu faces assigned "Symmetry" BC will work. However, the results did not were incorrect (the contours on the symmetry faces were no same)

So It appeared to me that a 120 deg symmetry model / 180 deg symmetry model should give correct results. I tried the same with a 180deg symmetry model but again the contours on the symm faces are not matching eachother
I tried the mrf on full model , and the results are symmetric (about a cross section about the axis of rotation)

My questions from the above are as follows:
1) Can't symmetry BC used with MRF modelling??
2) Is Expecting the same velocity profile on the symm faces wrong??