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-   -   Boundary conditions for turbulent boundary layer (http://www.cfd-online.com/Forums/fluent/48520-boundary-conditions-turbulent-boundary-layer.html)

Thomas June 17, 2008 03:54

Boundary conditions for turbulent boundary layer
 
I am using a rectangular channel with classic boundary conditions ( velocity_inlet 20m/s, wall, pressure_outflow and symmetry) and RSM model, to get a turbulent boundary layer. I compute the flow and then I extract the profiles for Ux, Uy, Uz and the 6 Reynolds stress u', v', w', u'v', u'w' and v'w'. I want to compute again the flow with the extracted profiles as boundary conditions. But it seems there is a new transition to turbulence, although the precedent flow was already turbulent. That spoil the result for the 2nd computation.

Thanks for your help.

Rakesh Jha June 17, 2008 05:14

Re: Boundary conditions for turbulent boundary lay
 
Same thing I observed on the same model. Had no clue virtually why does it happen.


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