how would one model a fan hanging from a ceiling wall in fluent? i checked out most of the tutorials and was not happy with the periodic BC example.Can i solve it using axisymmetric problem? if so how? I have to solve as 3D problem.Wiil be glad to hear any suggestions. Thanks,Mavinakere.

Why were you dissatisfied with periodic BC's? I do not think that you want/need to model the full 360 deg. for this problem. Just model a sector corresponding to one blade and use periodic BC's. Your upstream and downstream sections can be sectors which are circumferentially equivalent to the fan sector, so a Multiple Reference Frame approach would work fine.

Have fun!

cfdweirdo

The problem with periodic BC is, I cannot make a sector with a comnverging point.Periodic BC cannot be applied where 2 surfaces of a sector meet. And please tell me, could this be solved as axisyymetric problem? using any other BC. Thanks,Mavinakere.

It can't use axisyymetric BC to solve . Because of the flow of the fan is not axisyymetric, so that you can't assume that.Try to model full model to solve your problem.