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-   -   Why Specify rotation speed? (http://www.cfd-online.com/Forums/fluent/49218-why-specify-rotation-speed.html)

NTM September 9, 2008 11:35

Why Specify rotation speed?
 
Hello,

When using the multiple reference frame model we specify the rpm of the rotor. My question is; is it possible that we don't speficy the rotation speed and the CFD code calculates the rotational speed (in the case of a wind turbine) casued by the incident wind. Obviously we'd have to specify some more parameters like inertia I guess but is this possible?

Thanks a bunch

Davy September 12, 2008 00:45

Re: Why Specify rotation speed?
 
You may not use the MRF approach based on the steady state then and a complicated time-dependent simulation may be needed.

NTM September 12, 2008 05:39

Re: Why Specify rotation speed?
 
Davy,

Thanks for oth your responses. Why may I not use the MRF on the steady state simulation?

Also can you please elaborate on the time dependent simulation thanks a bunch.

NTM


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