diff --git a/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.C b/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.C index 066e427741e4e576b210e036b21ea282495924df..dd34c6ddae41162d8ee49d832762bda2e295d014 100644 --- a/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.C +++ b/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.C @@ -85,6 +85,18 @@ tmp<volScalarField> kOmegaSST::F2() const } +tmp<volScalarField> kOmegaSST::F3() const +{ + tmp<volScalarField> arg3 = min + ( + 150*(mu()/rho_)/(omega_*sqr(y_)), + scalar(10) + ); + + return 1 - tanh(pow4(arg3)); +} + + // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // kOmegaSST::kOmegaSST @@ -198,6 +210,15 @@ kOmegaSST::kOmegaSST 0.31 ) ), + b1_ + ( + dimensioned<scalar>::lookupOrAddToDict + ( + "b1", + coeffDict_, + 1.0 + ) + ), c1_ ( dimensioned<scalar>::lookupOrAddToDict @@ -268,7 +289,7 @@ kOmegaSST::kOmegaSST / max ( a1_*omega_, - F2()*sqrt(2.0)*mag(symm(fvc::grad(U_))) + b1_*F2()*F3()*sqrt(2.0)*mag(symm(fvc::grad(U_))) ) ); mut_.correctBoundaryConditions(); @@ -347,6 +368,7 @@ bool kOmegaSST::read() beta2_.readIfPresent(coeffDict()); betaStar_.readIfPresent(coeffDict()); a1_.readIfPresent(coeffDict()); + b1_.readIfPresent(coeffDict()); c1_.readIfPresent(coeffDict()); return true; @@ -448,7 +470,7 @@ void kOmegaSST::correct() // Re-calculate viscosity - mut_ = a1_*rho_*k_/max(a1_*omega_, F2()*sqrt(S2)); + mut_ = a1_*rho_*k_/max(a1_*omega_, b1_*F2()*F3()*sqrt(S2)); mut_.correctBoundaryConditions(); // Re-calculate thermal diffusivity diff --git a/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.H b/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.H index d498a9a1f1031afdbeeb768dc1c9f3453720b170..6cc40f6b683e81e8955566e3803b5462597c9298 100644 --- a/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.H +++ b/src/turbulenceModels/compressible/RAS/kOmegaSST/kOmegaSST.H @@ -38,6 +38,15 @@ Description Nov. 2001 \endverbatim + with the addition of the F3 term for rough walls from + \verbatim + Hellsten, A. + "Some Improvements in Menter’s k-omega-SST turbulence model" + 29th AIAA Fluid Dynamics Conference, + AIAA-98-2554, + June 1998. + \endverbatim + Note that this implementation is written in terms of alpha diffusion coefficients rather than the more traditional sigma (alpha = 1/sigma) so that the blending can be applied to all coefficuients in a consistent @@ -69,6 +78,7 @@ Description gamma1 0.5532; gamma2 0.4403; a1 0.31; + b1 1.0; c1 10.0; } \endverbatim @@ -125,6 +135,7 @@ protected: dimensionedScalar betaStar_; dimensionedScalar a1_; + dimensionedScalar b1_; dimensionedScalar c1_; @@ -144,6 +155,7 @@ protected: tmp<volScalarField> F1(const volScalarField& CDkOmega) const; tmp<volScalarField> F2() const; + tmp<volScalarField> F3() const; tmp<volScalarField> blend ( diff --git a/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.C b/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.C index 02899ec4c9b197b0b30169ddac07251c288e492b..cd1fd278e1b46f59a887952942f9728dbdb567a4 100644 --- a/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.C +++ b/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.C @@ -69,6 +69,7 @@ tmp<volScalarField> kOmegaSST::F1(const volScalarField& CDkOmega) const return tanh(pow4(arg1)); } + tmp<volScalarField> kOmegaSST::F2() const { tmp<volScalarField> arg2 = min @@ -85,6 +86,18 @@ tmp<volScalarField> kOmegaSST::F2() const } +tmp<volScalarField> kOmegaSST::F3() const +{ + tmp<volScalarField> arg3 = min + ( + 150*nu()/(omega_*sqr(y_)), + scalar(10) + ); + + return 1 - tanh(pow4(arg3)); +} + + // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * // kOmegaSST::kOmegaSST @@ -188,6 +201,15 @@ kOmegaSST::kOmegaSST 0.31 ) ), + b1_ + ( + dimensioned<scalar>::lookupOrAddToDict + ( + "b1", + coeffDict_, + 1.0 + ) + ), c1_ ( dimensioned<scalar>::lookupOrAddToDict @@ -246,7 +268,7 @@ kOmegaSST::kOmegaSST / max ( a1_*omega_, - F2()*sqrt(2.0)*mag(symm(fvc::grad(U_))) + b1_*F2()*F3()*sqrt(2.0)*mag(symm(fvc::grad(U_))) ) ); nut_.correctBoundaryConditions(); @@ -338,6 +360,7 @@ bool kOmegaSST::read() beta2_.readIfPresent(coeffDict()); betaStar_.readIfPresent(coeffDict()); a1_.readIfPresent(coeffDict()); + b1_.readIfPresent(coeffDict()); c1_.readIfPresent(coeffDict()); return true; @@ -416,7 +439,7 @@ void kOmegaSST::correct() // Re-calculate viscosity - nut_ = a1_*k_/max(a1_*omega_, F2()*sqrt(S2)); + nut_ = a1_*k_/max(a1_*omega_, b1_*F2()*F3()*sqrt(S2)); nut_.correctBoundaryConditions(); } diff --git a/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.H b/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.H index 7b2580094e1cb76e511066f3cb7dbd8e36aa6e25..91c281bf4e26a3f2d8e8a9d530dd52109196ebca 100644 --- a/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.H +++ b/src/turbulenceModels/incompressible/RAS/kOmegaSST/kOmegaSST.H @@ -33,10 +33,19 @@ Description Turbulence model described in: \verbatim - Menter, F., Esch, T. - "Elements of Industrial Heat Transfer Prediction" + Menter, F., Esch, T., + "Elements of Industrial Heat Transfer Prediction", 16th Brazilian Congress of Mechanical Engineering (COBEM), - Nov. 2001 + Nov. 2001. + \endverbatim + + with the addition of the F3 term for rough walls from + \verbatim + Hellsten, A. + "Some Improvements in Menter’s k-omega-SST turbulence model" + 29th AIAA Fluid Dynamics Conference, + AIAA-98-2554, + June 1998. \endverbatim Note that this implementation is written in terms of alpha diffusion @@ -69,6 +78,7 @@ Description gamma1 0.5532; gamma2 0.4403; a1 0.31; + b1 1.0; c1 10.0; } \endverbatim @@ -122,6 +132,7 @@ protected: dimensionedScalar betaStar_; dimensionedScalar a1_; + dimensionedScalar b1_; dimensionedScalar c1_; //- Wall distance field @@ -139,6 +150,7 @@ protected: tmp<volScalarField> F1(const volScalarField& CDkOmega) const; tmp<volScalarField> F2() const; + tmp<volScalarField> F3() const; tmp<volScalarField> blend (