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docinger August 16, 2013 09:42

Boundary conditions ( k epsilon ) for wind turbine application
 
Hi wind turbiners out there!

i was wondering if there are good guesses out there for turbulence boundary conditions in wind turbine applications.

I'm using a k-epsilon model right now on my boundaries far far away from my point of interest ... and i did some reading about this topic and I found widely varying rules for setting k and epsilon inlet boundaries.

Right now i'm using values of about
k=0.04,
epsilon=0.25 a
mixingLengh of 0.05 and a
turbulent intensity of 0.02

the results look alright.
But other sources recommend values down to k=0.00006 and up to 0.4 and epsilon=0.0008, up to 1.0

So i was wondering what values you have good experiences with?
k? epsilon? omega? in "ideal, standardized ;) " wind

Regards,
Andreas


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