void kOmega::correct()
{
RASModel::correct();
if (!turbulence_)
{
return;
}
volScalarField G("RASModel::G", nut_*2*magSqr(symm(fvc::grad(U_))));
// Update omega and G at the wall
omega_.boundaryField().updateCoeffs();
// Turbulence specific dissipation rate equation
tmp<fvScalarMatrix> omegaEqn
(
fvm::ddt(omega_)
+ fvm::div(phi_, omega_)
- fvm::Sp(fvc::div(phi_), omega_)
- fvm::laplacian(DomegaEff(), omega_)
==
alpha_*G*omega_/k_
- fvm::Sp(beta_*omega_, omega_)
);
omegaEqn().relax();
omegaEqn().boundaryManipulate(omega_.boundaryField());
solve(omegaEqn);
bound(omega_, omega0_);
// Turbulent kinetic energy equation
tmp<fvScalarMatrix> kEqn
(
fvm::ddt(k_)
+ fvm::div(phi_, k_)
- fvm::Sp(fvc::div(phi_), k_)
- fvm::laplacian(DkEff(), k_)
==
G
- fvm::Sp(Cmu_*omega_, k_)
);
kEqn().relax();
solve(kEqn);
bound(k_, k0_);
// Re-calculate viscosity
nut_ = k_/(omega_ + omegaSmall_);
nut_.correctBoundaryConditions();
}
void gammaSST<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_;
volScalarField& omega_ = this->omega_;
volScalarField& k_ = this->k_;
eddyViscosity<RASModel<BasicTurbulenceModel> >::correct();
volScalarField divU(fvc::div(fvc::absolute(this->phi(), U)));
tmp<volTensorField> tgradU = fvc::grad(U);
const volScalarField S2(2*magSqr(symm(tgradU())));
const volScalarField S("S", sqrt(S2));
const volScalarField W("Omega", sqrt(2*magSqr(skew(tgradU()))));
volScalarField G(this->GName(), nut*S*W);
tgradU.clear();
// Update omega and G at the wall
omega_.boundaryFieldRef().updateCoeffs();
const volScalarField CDkOmega
( "CD",
(2*this->alphaOmega2_)*(fvc::grad(k_) & fvc::grad(omega_))/omega_
);
const volScalarField F1("F1", this->F1(CDkOmega));
{
volScalarField gamma(this->gamma(F1));
volScalarField beta(this->beta(F1));
// Turbulent frequency equation
tmp<fvScalarMatrix> omegaEqn
(
fvm::ddt(alpha, rho, omega_)
+ fvm::div(alphaRhoPhi, omega_)
- fvm::laplacian(alpha*rho*this->DomegaEff(F1), omega_)
==
alpha*rho*gamma*S*W
- fvm::Sp(alpha*rho*beta*omega_, omega_)
- fvm::SuSp
(
alpha*rho*(F1 - scalar(1))*CDkOmega/omega_,
omega_
)
);
omegaEqn.ref().relax();
omegaEqn.ref().boundaryManipulate(omega_.boundaryFieldRef());
solve(omegaEqn);
bound(omega_, this->omegaMin_);
}
// Turbulent kinetic energy equation
const volScalarField FonLim(
"FonLim",
min( max(sqr(this->y_)*S/this->nu() / (
2.2*ReThetacLim_) - 1., 0.), 3.)
);
const volScalarField PkLim(
"PkLim",
5*Ck_ * max(gammaInt()-0.2,0.) * (1-gammaInt()) * FonLim *
max(3*CSEP_*this->nu() - this->nut_, 0.*this->nut_) * S * W
);
tmp<fvScalarMatrix> kEqn
(
fvm::ddt(alpha, rho, k_)
+ fvm::div(alphaRhoPhi, k_)
- fvm::laplacian(alpha*rho*this->DkEff(F1), k_)
==
alpha*rho*(G*gammaInt() + PkLim)
- fvm::Sp(max(gammaInt(),scalar(0.1)) * alpha*rho*this->betaStar_*omega_, k_)
);
kEqn.ref().relax();
solve(kEqn);
bound(k_, this->kMin_);
this->correctNut(S2, this->F23());
// Intermittency equation (2)
volScalarField Pgamma1 = Flength_ * S * gammaInt_ * Fonset(S);
volScalarField Pgamma2 = ca2_ * W * gammaInt_ * Fturb();
tmp<fvScalarMatrix> gammaEqn
(
fvm::ddt(alpha, rho, gammaInt_)
+ fvm::div(alphaRhoPhi, gammaInt_)
- fvm::laplacian(alpha*rho*this->DgammaEff(), gammaInt_)
==
alpha*rho*Pgamma1 - fvm::Sp(alpha*rho*Pgamma1, gammaInt_) +
alpha*rho*Pgamma2 - fvm::Sp(alpha*rho*ce2_*Pgamma2, gammaInt_)
);
gammaEqn.ref().relax();
solve(gammaEqn);
bound(gammaInt_,scalar(0));
if (debug && this->runTime_.outputTime()) {
S.write();
W.write();
F1.write();
CDkOmega.write();
const volScalarField Pgamma("Pgamma", Pgamma1*(scalar(1)-gammaInt_));
Pgamma.write();
const volScalarField Egamma("Egamma", Pgamma2*(scalar(1)-ce2_*gammaInt_));
Egamma.write();
FonLim.write();
PkLim.write();
Fonset(S)().write();
FPG()().write();
}
}
