void tatunRNG::correct() { if (!turbulence_) { // Re-calculate viscosity mut_ = rho_*Cmu_*sqr(k_)/epsilon_; mut_.correctBoundaryConditions(); // Re-calculate thermal diffusivity alphat_ = mut_/Prt_; alphat_.correctBoundaryConditions(); return; } RASModel::correct(); volScalarField divU(fvc::div(phi_/fvc::interpolate(rho_))); if (mesh_.moving()) { divU += fvc::div(mesh_.phi()); } tmp<volTensorField> tgradU = fvc::grad(U_); volScalarField S2((tgradU() && dev(twoSymm(tgradU())))); tgradU.clear(); //volScalarField G(type() + ".G", mut_*S2); volScalarField G(GName(), mut_*S2); // changed from 2.1.1 --> 2.2.2 volScalarField eta(sqrt(mag(S2))*k_/epsilon_); volScalarField eta3(eta*sqr(eta)); volScalarField R ( ((eta*(-eta/eta0_ + scalar(1)))/(beta_*eta3 + scalar(1))) ); // Update epsilon and G at the wall epsilon_.boundaryField().updateCoeffs(); // Dissipation equation tmp<fvScalarMatrix> epsEqn ( fvm::ddt(rho_, epsilon_) + fvm::div(phi_, epsilon_) - fvm::laplacian(DepsilonEff(), epsilon_) == (C1_ - R)*G*epsilon_/k_ - fvm::SuSp(((2.0/3.0)*C1_ + C3_)*rho_*divU, epsilon_) - fvm::Sp(C2_*rho_*epsilon_/k_, epsilon_) ); epsEqn().relax(); epsEqn().boundaryManipulate(epsilon_.boundaryField()); solve(epsEqn); bound(epsilon_, epsilonMin_); volScalarField YMperk = 2.0*rho_*epsilon_/(soundSpeed_*soundSpeed_); // Turbulent kinetic energy equation tmp<fvScalarMatrix> kEqn ( fvm::ddt(rho_, k_) + fvm::div(phi_, k_) - fvm::laplacian(DkEff(), k_) == G - fvm::SuSp(2.0/3.0*rho_*divU, k_) - fvm::Sp(rho_*epsilon_/k_, k_) - fvm::Sp(YMperk, k_) ); kEqn().relax(); solve(kEqn); bound(k_, kMin_); // Re-calculate viscosity mut_ = rho_*Cmu_*sqr(k_)/epsilon_; mut_.correctBoundaryConditions(); // Re-calculate thermal diffusivity alphat_ = mut_/Prt_; alphat_.correctBoundaryConditions(); }
void RNGkEpsilon<BasicTurbulenceModel>::correct() { if (!this->turbulence_) { return; } // Local references const alphaField& alpha = this->alpha_; const rhoField& rho = this->rho_; const surfaceScalarField& alphaRhoPhi = this->alphaRhoPhi_; const volVectorField& U = this->U_; volScalarField& nut = this->nut_; eddyViscosity<RASModel<BasicTurbulenceModel> >::correct(); volScalarField divU(fvc::div(fvc::absolute(this->phi(), U))); tmp<volTensorField> tgradU = fvc::grad(U); volScalarField S2((tgradU() && dev(twoSymm(tgradU())))); tgradU.clear(); volScalarField G(this->GName(), nut*S2); volScalarField eta(sqrt(mag(S2))*k_/epsilon_); volScalarField eta3(eta*sqr(eta)); volScalarField R ( ((eta*(-eta/eta0_ + scalar(1)))/(beta_*eta3 + scalar(1))) ); // Update epsilon and G at the wall epsilon_.boundaryField().updateCoeffs(); // Dissipation equation tmp<fvScalarMatrix> epsEqn ( fvm::ddt(alpha, rho, epsilon_) + fvm::div(alphaRhoPhi, epsilon_) - fvm::laplacian(alpha*rho*DepsilonEff(), epsilon_) == (C1_ - R)*alpha*rho*G*epsilon_/k_ - fvm::SuSp(((2.0/3.0)*C1_ + C3_)*alpha*rho*divU, epsilon_) - fvm::Sp(C2_*alpha*rho*epsilon_/k_, epsilon_) + epsilonSource() ); epsEqn().relax(); epsEqn().boundaryManipulate(epsilon_.boundaryField()); solve(epsEqn); bound(epsilon_, this->epsilonMin_); // Turbulent kinetic energy equation tmp<fvScalarMatrix> kEqn ( fvm::ddt(alpha, rho, k_) + fvm::div(alphaRhoPhi, k_) - fvm::laplacian(alpha*rho*DkEff(), k_) == alpha*rho*G - fvm::SuSp((2.0/3.0)*alpha*rho*divU, k_) - fvm::Sp(alpha*rho*epsilon_/k_, k_) + kSource() ); kEqn().relax(); solve(kEqn); bound(k_, this->kMin_); correctNut(); }