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-   -   How to implement swirling phenomenon to model FAN (http://www.cfd-online.com/Forums/main/10595-how-implement-swirling-phenomenon-model-fan.html)

OPticdesigner January 9, 2006 00:40

How to implement swirling phenomenon to model FAN
 
HI I tried to use EFD.Lab to model a DC Axial Fan. How do I implement swirling phenomenon on the DC Axial fan?


Harry Fulmer January 9, 2006 04:37

Re: How to implement swirling phenomenon to model
 
Buy Flotherm.

TITAN Algorithms, Staff January 9, 2006 07:41

Re: How to implement swirling phenomenon to model
 
Dear OpticDesigner:

Swirl flows out of a fan can be implemented by setting tangential face velocity boundary conditions on the lea side of your fan object.

See the example I created at the following link: http://CFD.TITANAlgorithms.com

The fan model demonstrated on this page shows that a uniform swirl that can be created with just a small dedicated setup of control surfaces to create the swirl.

If you are interested in the model, I would be happy to provide it for you.

Kind Regards,

DSS www.TITANAlgorithms.com

Harry Fulmer January 9, 2006 08:16

Re: How to implement swirling phenomenon to model
 
Wow, nice response!

The swirl is a function of the operating point of the fan, at high flow rates the proportion of swirl to axial velocity is reduced. This is all related to the fan efficiency curve.


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