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();
}
