wall boundary condition for k-w SST model

Joachim · April 16, 2014, 23:44

Hey everyone!

I read that the k-w SST model could be applied down to the wall without any specific treatment.

I would like to apply the boundary conditions for k and w at the wall in my finite volume code (cell centered). Therefore, I need to compute the fluxes at the boundary. I can set k=0, but what should I do with w? I read in an article that the boundary condition should not be applied directly at the surface (that makes sense, since there is the distance to the wall in the denominator).

My question: how should I handle the BC for w? Should I directly impose the value in the first cell? (instead of computing the fluxes, etc.)

Thank you very much!

Joachim

mb.pejvak · April 17, 2014, 01:46

Dear Friend;
in Menter's paper [1], you can find all of BC you need to apply for SST k-w.
and about inflow condition, paper of Spalart and Rumsey [2] can be certainly useful.
If you can not find them, Send me an email, I'll give to you this papers in which you can find your answer.

[1] Menter, F. R., “Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications,” AIAA Journal, Vol. 32, No. 8, 1994, pp.
1598–1605.

[2] Philippe R. Spalart and Christopher L. Rumsey. "Effective Inflow Conditions for Turbulence Models in Aerodynamic Calculations", AIAA Journal, Vol. 45, No. 10 (2007), pp. 2544-2553.

Joachim · April 17, 2014, 08:53

Haha thanks! I was only looking at Menter 2003. Did not even think about looking at the original paper from 94...

April 16, 2014, 23:44	wall boundary condition for k-w SST model	#1
Joachim Senior Member Joachim Join Date: Mar 2012 Location: Paris, France Posts: 145 Rep Power: 15	Hey everyone! I read that the k-w SST model could be applied down to the wall without any specific treatment. I would like to apply the boundary conditions for k and w at the wall in my finite volume code (cell centered). Therefore, I need to compute the fluxes at the boundary. I can set k=0, but what should I do with w? I read in an article that the boundary condition should not be applied directly at the surface (that makes sense, since there is the distance to the wall in the denominator). My question: how should I handle the BC for w? Should I directly impose the value in the first cell? (instead of computing the fluxes, etc.) Thank you very much! Joachim

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April 17, 2014, 01:46		#2
mb.pejvak Senior Member Mehdi Baba Mehdi Join Date: Jan 2011 Posts: 158 Rep Power: 15	Dear Friend; in Menter's paper [1], you can find all of BC you need to apply for SST k-w. and about inflow condition, paper of Spalart and Rumsey [2] can be certainly useful. If you can not find them, Send me an email, I'll give to you this papers in which you can find your answer. [1] Menter, F. R., “Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications,” AIAA Journal, Vol. 32, No. 8, 1994, pp. 1598–1605. [2] Philippe R. Spalart and Christopher L. Rumsey. "Effective Inflow Conditions for Turbulence Models in Aerodynamic Calculations", AIAA Journal, Vol. 45, No. 10 (2007), pp. 2544-2553.

April 17, 2014, 08:53		#3
Joachim Senior Member Joachim Join Date: Mar 2012 Location: Paris, France Posts: 145 Rep Power: 15	Haha thanks! I was only looking at Menter 2003. Did not even think about looking at the original paper from 94...