|November 15, 2005, 18:48||
S-A Turbulence Model and drag prediction
Just needed everyone's opinion on the use of the S-A turbulence model for drag prediction of airfoils.
I have used the S-A model for predicting Lift Coef.. at different angles of attack and the results are very close to the wind tunnel results, however I havent had luck with the Drag Coef.. values?
Which turbulence model would predict Drag as nicely as the S-A does lift?
Many thanks in advance.
|January 11, 2016, 07:47||
Join Date: Oct 2014
Posts: 4Rep Power: 3
Dear Alan ,
as compared to Cl , Cd are more sensitive to grid refinements .
Also , S-A is not very accurate (compared to k-w SST ) in resolving the flow separations, that may be occurring at high AOA.
You can refine the mesh using Prism elements at boundary layer and use a combination of RANS models with first order and second upwind schemes to save computational resources.
Hope that Helps !
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