eddy viscosity distributions in the wake?

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 June 25, 2003, 22:22 eddy viscosity distributions in the wake? #1 zqnwpu Guest   Posts: n/a Sponsored Links Is there a gap for eddy viscosity distribution in the wake ? when i use structure c grids,there is.but my classimate using unstructured grids got a no-gap result,why?

 June 26, 2003, 09:38 Re: eddy viscosity distributions in the wake? #2 kei-tee Guest   Posts: n/a Hi, wake of C grids is singular line. Usually, we use wake line BC as averaged value of nearest grid points. ie. suppose wake line are j=1,jmax, q(1)=q(jmax)=0.5*(q(2)+q(jmax-1)) best regards kei-tee

 June 27, 2003, 03:53 Re: eddy viscosity distributions in the wake? #3 zqnwpu Guest   Posts: n/a Thank you very much. I just do as you said .but there is a gap in the wake ,I don't know whether it is right.

 June 29, 2003, 04:12 Re: eddy viscosity distributions in the wake? #4 kei-tee Guest   Posts: n/a What kind of Turbulence model do you use? Some model needs special treatment for wake BC.

 July 1, 2003, 00:26 Re: eddy viscosity distributions in the wake? #5 zqnwpu Guest   Posts: n/a i use k-epsilon,k-omeg & other use spalart.

 July 1, 2003, 09:47 Re: eddy viscosity distributions in the wake? #6 kei-tee Guest   Posts: n/a S-A needs wall distance. In wake region, you should take the value as large value (ex. 1.0E6). I don't know for k-eps & k-omega. As long as you impose averaged value on Q vector & eddy viscosity in wake region, there is not a gap, I think.

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