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-   -   Integral Length Scale vs Turbulent Length Scale (http://www.cfd-online.com/Forums/fluent/67116-integral-length-scale-vs-turbulent-length-scale.html)

Scott Nordsen August 4, 2009 11:42

Integral Length Scale vs Turbulent Length Scale
 
I have a paper that specifies an integral length scale, L.

The input option for fluent is for a turbulent length scale, l.

The paper does not specify how the value, L, was measured, though I assume it was a trait of the turbulence grid.

My question: is there a "standard" approach to convert L to l for use in Fluent. Granted this may not be correct, but at least it is standard.

Thanks

Scott

p_kmb April 15, 2013 06:27

I have the same question.

If I know that for external flow in area with low buildings L=140m.
What turbulent length scale should I define in CFD?

Paulina

kangluyang January 20, 2014 02:17

Quote:

Originally Posted by p_kmb (Post 420619)
I have the same question.

If I know that for external flow in area with low buildings L=140m.
What turbulent length scale should I define in CFD?

Paulina

Hi,
I have some impression that AIJ may have some materials about this, you could find from it.
Kang Luyang


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