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David December 21, 2006 08:31

Help needed
 
I am running LES of turbulent channel flow but am going to put a trip in the flow to generate the turbulence before running LES. Any ideas of how i should do this and what size the trip would need to be.

Thanks in advance

hugo December 21, 2006 09:36

Re: Help needed
 
Hi David

If you are running LES, why you don't use in the inlet one of the Fluctuation Velocity Algorith; you have the Vortex Method and the Spectral Synthesizer. In the Vortex method, for example, you can specify a number of Vortices in the inlet. Then you have a turbulence Specification method and there you can use k and epsilon (from RANS), turbulent intensity, length scale, viscosity radio, etc.

Good luck

Hugo



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