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Krishna Rani June 9, 2008 01:19

Isotropic turbulence
 
Hello I am doing isotropic turbulence simulation in different shapes. Firstly, i shall be doing it in a duct of equal size, then in a sphere, then in a prism. I am not getting the method to give initial condition for this case. can someone help me?

bye


allan June 20, 2008 15:13

Re: Isotropic turbulence
 
Hi

I don't really understand your question, but say for a two equation k-e turbulence model, you need to set two conditions on the boundary: a value for kinetic energy and dissipation or turbulence intensity and length scale. The are generally the same thing and are connected by simple equations. One generally sets turbulence intensity to about 10% and a length scale to 10% of the smallest dimension on the inlet.

allan


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