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-   -   Advice for fan cooling needed (http://www.cfd-online.com/Forums/cfx/20918-advice-fan-cooling-needed.html)

CK January 12, 2005 19:57

Advice for fan cooling needed
 
Hi,

I am trying to simulate the cooling of a power supply by a fan. I just started using CFX hence I am having trouble to input the fan curve in order to obtain the proper volume flow rate through the fan. Can anyone give me some advices?

Thanks in advance,

CK

Glenn Horrocks January 17, 2005 17:13

Re: Advice for fan cooling needed
 
Hi,

Are you trying to model the fan using a momentum source?

Glenn Horrocks

CK January 20, 2005 00:00

Re: Advice for fan cooling needed
 
Hi Glenn, Yes I was planning to use a momentum source to simulate the fan. Is there a different approach?

CK

Glenn Horrocks January 20, 2005 17:53

Re: Advice for fan cooling needed
 
Hi,

A momentum source is often the best method where you don't want to model flow in the fan itself. As for making the flow follow the fan operating curve, that can be implemented using a 1D CEL interpolation and some CEL expressions.

Other options besides momentum sources include: 1) modelling the fan in detail 2) if the upstream or downstream side of the fan is not important you can model the fan using a boundary condition with a specified mass flow rate or pressure.

Glenn Horrocks


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