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airfoil April 10, 2007 09:37

Turbulence Intensity and Length
 
Hi All,

May I know what is the criteria or assumption I have to follow for Inlet and Pressure boundary's Turbulence Intensity and Length? I know T.I is in percentage term but how do I decide the value? Does it varied from model to model? Thank you in advance!

Jonas Larsson April 10, 2007 12:40

Re: Turbulence Intensity and Length
 
There is a bit written about this in CFD-Wiki. You can find it here:

http://www.cfd-online.com/Wiki/Turbu...ary_conditions

airfoil April 10, 2007 19:35

Re: Turbulence Intensity and Length
 
Jonas,

Thank you very much! Appreciate!

EJAZ April 11, 2007 18:29

Re: Turbulence Intensity and Length
 
Question: How to specify the inflow turbulence? Answer: The turbulent kinetic energy can be estimated as follows , where x is the velocity pulsation amplitude relative to the mean flow velocity V; The rate of the turbulent energy dissipation is estimated from , where μ is the dynamic molecular viscosity, N = 100 is a parameter.

for details http://www.fv-tech.com/index.php?id=73

airfoil April 12, 2007 01:47

Re: Turbulence Intensity and Length
 
thank you EJAZ


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