Rotation/Curvature Correction for Spalart Allmaras model (SA-RC) is explained here.
Complessibility Correction for Spalart Allmaras model (SA-CC) is explained here.
negative Spalart Allmaras model (SA-neg) is explained here.
Steady-state simulation of Ahmed Body (slant angle is 30 degrees) using negative SA model was done.
RC correction and compressibility correction from my previous works were also included.
Mesh is explained here.
Solver: rhoLTSPimpleFoam
Wind speed: 60m/s
Turbulence model: SA-neg with Rotation/Curvature and compressibility correction
Div scheme: Gamma NVD scheme
・Force Coefficients
・Gradient Contours
nuTilda and Ux are changed by negative SA model.
Both of the area where nuTilda is large and the area where Ux is smaller than zero got smaller.
Complessibility Correction for Spalart Allmaras model (SA-CC) is explained here.
negative Spalart Allmaras model (SA-neg) is explained here.
Steady-state simulation of Ahmed Body (slant angle is 30 degrees) using negative SA model was done.
RC correction and compressibility correction from my previous works were also included.
Mesh is explained here.
Solver: rhoLTSPimpleFoam
Wind speed: 60m/s
Turbulence model: SA-neg with Rotation/Curvature and compressibility correction
Div scheme: Gamma NVD scheme
・Force Coefficients
Incomp/Comp = incompressible/compressible
DDES = Delayed Detached Eddy Simulation
(no)CC = (not) Compressibility Correction employed
neg = negative SA model
Negative SA model didn't made large differences in forces.
・Gradient Contours
nuTilda of SA-RC Comp CC
nuTilda of SA-RC Comp CC neg
Cp of SA-RC Comp CC
Cp of SA-RC Comp CC neg
Ux of SA-RC Comp CC
Ux of SA-RC Comp CC neg
nuTilda and Ux are changed by negative SA model.
Both of the area where nuTilda is large and the area where Ux is smaller than zero got smaller.
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