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rohit July 21, 2008 02:33

Boundary conditions for rotating fan
 
I want to know, which type of boundary conditions should be given to rotating machines case? (turbomachine). I want to simulate a cooling fan, and I want to predict performance curve then which type of boundary conditions should I chose?

jesse July 21, 2008 10:54

Re: Boundary conditions for rotating fan
 
you will use Rotating Reference Frame, that means, non-slip BC on the wall, while wall is given an rotating speed;

inlet:total pressure outlet:static pressure

Raj July 23, 2008 04:33

Re: Boundary conditions for rotating fan
 
use pressure inlet and pressure outlet boundary condition. also make fan blade as moving wall.

rohit July 23, 2008 04:53

Re: Boundary conditions for rotating fan
 
Thanks a lot buddy. But I am confused, why should we use pressure and not mass flow rate? Pls answer me.


Raj July 23, 2008 04:59

Re: Boundary conditions for rotating fan
 
yeah u can use if u know mass flow rate at inlet..


rohit July 24, 2008 00:26

Re: Boundary conditions for rotating fan
 
Hi raj, Thanks a lot. But could you tell me which one will be better (pressure or mass flow) ? And why???



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