References for Mixinglength calculation?
Hi,
Could anybody tell me some reference books or papers on how to calculate mixinglength in 3D simulating? say, I have got the velocity field,etc... Many thanks! Ray 
Re: References for Mixinglength calculation?

Re: References for Mixinglength calculation?
Thanks! Selina.
The problem rises from that in most turbulence modelling, the mixinglength is prescribed for model closure. Hence the mixinglength may be grid dependent. But physically, it should depend on the system operating conditions. So what I am concerning is if I can derive out the mixinglength from the computed flow field. Some work seems has been done for 2D case, such as Von Karman's formula which related the mixinglength to the velocity profile. But how about 3D? Any more clue or suggestion? Ray 
Re: References for Mixinglength calculation?
Well, it did not caught much of the context, but... mixing length should be close to the length scale given by kolmogorov's equation for high Reynolds:
mix_len =~ Cmu^(3/4) * k^(3/2) / epsilon Also, if your flow looks like a singlebounded one (and wall is mostly homogeneous) you may apply von Karman's formula but both should remain the same close to the wall... Yours, Christophe 
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