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Turbulence Intensity and Length

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Old   April 10, 2007, 09:37
Default Turbulence Intensity and Length
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airfoil
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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!
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Old   April 10, 2007, 12:40
Default Re: Turbulence Intensity and Length
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Jonas Larsson
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There is a bit written about this in CFD-Wiki. You can find it here:

http://www.cfd-online.com/Wiki/Turbu...ary_conditions
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Old   April 10, 2007, 19:35
Default Re: Turbulence Intensity and Length
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airfoil
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Jonas,

Thank you very much! Appreciate!
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Old   April 11, 2007, 18:29
Default Re: Turbulence Intensity and Length
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EJAZ
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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
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Old   April 12, 2007, 01:47
Default Re: Turbulence Intensity and Length
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airfoil
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thank you EJAZ
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