# k and epsilon

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 April 10, 2002, 04:28 k and epsilon #1 Davide Guest   Posts: n/a Dear users, I'm working with a simulation of external aerodynamics relating to a truck. How do I specify k and epsilon at boundary of a wind tunnel chamber with turbulence intensity I=0.2%? Thanks.

 April 11, 2002, 04:10 Re: k and epsilon #2 Andrew Parker Guest   Posts: n/a This is very easy, especially if you have the turbulence intensity, just go to the help menu and under the k-e model you will find two formulas that you can use to do this. Andy

 April 11, 2002, 08:00 Re: k and epsilon #3 Davide Guest   Posts: n/a Yes, I know what you mean but k is a funcion of I (I:intensity) and epsilon is a function of (mu-t/mu). The ratio mu-t/mu is between 10 and 100. So how can I estimate the value? Can you do an example? Davide.

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