how to define the symmetric boundary condition for Menter's SST turbulence model?
hello,
I am using Menter's SST turbulence model in the turbulent plate case described in http://turbmodels.larc.nasa.gov/flatplate.html. How should I define the boundary condition at the symmetric part before the flat plane. thanks, flyingseed 
Use wall condition with zero shear.

thanks for your reply.
In process of solving the NS equations, it is OK that the no shear wall boundary condition can be applied. But in turbulent models, the variables are 'k' and 'omega', how can I define the no shear wall boundary? could you explain it more clearly? flyingseed 
which solver you are using?

you mean NS equations part? WENO5 for convective terms and 2nd center scheme for viscous terms.
And for turbulent models, 1st upwind scheme for convective terms and 2nd center scheme for diffusion terms. Thanks flyingseed 
Apply the wall boundary condition at the part of wall with zero shear (slip). Treat the plate as no slip boundary

yes, I did as you said in solving the NS. When solving the laminar plate, I got good results compared with the Blasius solution.
But when I turn on the turbulence model, the eddy viscosity(turbulent viscosity) is somewhat smaller than the results given in the nasa website. After checking every part of turbulence model, I found the symmetric boundary conditions before the plate for the turbulence model equations had very previous effects on the turbulent viscosity. So I am wondering which boundary condition should I adopt? thanks, flyingseed 
A symmety boundary condition is applied by setting the wallnormal gradient of the variables to zero.

thank you. I am trying this way. hope it works.
flyingseed 
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