Comparison of Rotation/Curvature Corrections for Spalart Allmaras model

Two Rotation/Curvature corrections were employed in previous articles (SA-RC and SA-RCM).

So I compared these models with the original SA.

14/02/2015
Correction: I used wrong Cr2 (= 2.0) for my previous calculation using SA-RC model. I re-ran the calculation with Cr2 = 12.0.

・Force Coefficients

Viscos force of every SA model agreed well the experiment, while pressure force of SA-RCM is farther away from the experiment than the other two models.

14/02/2015
SA-RC model with Cr2 = 12.0 worked better than original SA model.

・Gradient Contours

nuTilda of SA model

nuTilda of SA-RC model (Cr2 = 2.0)

nuTilda of SA-RC model (Cr2 = 12.0)

nuTilda of SA-RCM model

pressure of SA model

pressure of SA-RC model (Cr2 = 2.0)

pressure of SA-RC model (Cr2 = 12.0)

pressure of SA-RCM model

Ux of SA model

Ux of SA-RC model (Cr2 = 2.0)

Ux of SA-RC model (Cr2 = 12.0)

Ux of SA-RCM model

Appendix: RASProperties for SA-RC model

RASModel        SpalartAllmaras;

turbulence      on;

printCoeffs     on;

SpalartAllmarasCoeffs

{

    ashfordCorrection       false;

    spalartShurCorrection   true;

}