# SSt k-omega in gamma-Retetha transition model

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 May 31, 2012, 19:31 SSt k-omega in gamma-Retetha transition model #1 Senior Member   Mehdi Join Date: Jan 2011 Location: Iran Posts: 130 Rep Power: 8 I have a question about kinetic energy production term in SST k-omega turbulence model that uses in gamma-Retetha transition model. in the Langtry's Thesis production term of K introduces: P'k=Mt*S^2 S: absolute strain rate; Pk=min(P'k,10Dk) but in menter's (1994) paper that SST k-omega and in main paper of the transition model refer to this paper (Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications) this term was introduces as: p'k=mt*tij*dui/dxj tij: shear stress ; Pk=min(P'k,10Dk) now my question exactly is which one of these two P'k is correct? thanks in advance __________________ Best Regards; Mehdi E-mail: mb.pejvak[at]Gmail[dot]com

 May 31, 2012, 22:42 #2 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 it looks that both are same!!!!

 June 1, 2012, 04:56 #3 Senior Member   Mehdi Join Date: Jan 2011 Location: Iran Posts: 130 Rep Power: 8 Dear Far I suspect both of them are same. if you descritize Tij*dui/dxj you can see it Tij dui/dxj= (du/dy+dv/dx)^2+2*((du/dx)^2+(dv/dy)^2) S^2= ((du/dy+dv/dx)^2+(du/dx)^2+(dv/dy)^2) Am I correct? __________________ Best Regards; Mehdi E-mail: mb.pejvak[at]Gmail[dot]com

 June 1, 2012, 05:05 #4 Super Moderator   Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,358 Blog Entries: 6 Rep Power: 45 Let me check it again from my old notes

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