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-   -   Fan boundary condition in CFX? (https://www.cfd-online.com/Forums/cfx/96168-fan-boundary-condition-cfx.html)

 agastyamit January 14, 2012 14:11

Fan boundary condition in CFX?

Hi
can anyone please tell me how can i implement a fan boundary condition (as is present in Fluent) in CFX?

and also is it somehow possible to implement it somewhere in the fluid domain?

Thanks

 ghorrocks January 14, 2012 20:02

The fan BC will just be some function of velocity and pressure and you can impose this as a CEL expression.

There has been plenty of posts on the forum about how to implement fan curves, this may be of use.

 neha03sharma November 21, 2016 14:05

Hello Glenn,

I have to model a fan inside a domain in cfx. can you please send the link of post where I can find more information about fan curves

 ghorrocks November 21, 2016 16:55

 neha03sharma November 30, 2016 14:31

Hello Glenn,

I looked for the material available online. I am able to simulate the fan, however my fan is not aligned to any global co-ordinate but is rotated about x axis. So, while adding the momentum term, I should add components in both y and z directions proportional to the angle that fan axis make with z and y axis?

 ghorrocks November 30, 2016 18:17

Then you simply work out the components in the xyz axes. This is basic vectors.

 Antanas December 1, 2016 08:30

Quote:
 Originally Posted by neha03sharma (Post 627645) Hello Glenn, I looked for the material available online. I am able to simulate the fan, however my fan is not aligned to any global co-ordinate but is rotated about x axis. So, while adding the momentum term, I should add components in both y and z directions proportional to the angle that fan axis make with z and y axis?
Maybe I don't really understand your question, but just in case, you can create additional coordinate system based on your fan and specify velocity relative to it.

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