57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
|
if(turbulence)
|
||
|
|
{
|
||
|
|
if (mesh.changing())
|
||
|
|
{
|
||
|
|
y.correct();
|
||
|
|
}
|
||
|
|
|
||
|
|
tmp<volTensorField> tgradUb = fvc::grad(Ub);
|
||
|
|
volScalarField G = 2*nutb*(tgradUb() && dev(symm(tgradUb())));
|
||
|
|
tgradUb.clear();
|
||
|
|
|
||
|
|
# include "wallFunctions.H"
|
||
|
|
|
||
|
|
// Dissipation equation
|
||
|
|
fvScalarMatrix epsEqn
|
||
|
|
(
|
||
|
|
fvm::ddt(beta, epsilon)
|
||
|
|
+ fvm::div(phib, epsilon)
|
||
|
|
- fvm::laplacian(alphaEps*nuEffb, epsilon)
|
||
|
|
==
|
||
|
|
C1*beta*G*epsilon/k
|
||
|
|
- fvm::Sp(C2*beta*epsilon/k, epsilon)
|
||
|
|
);
|
||
|
|
|
||
|
|
# include "wallDissipation.H"
|
||
|
|
|
||
|
|
epsEqn.relax();
|
||
|
|
epsEqn.solve();
|
||
|
|
|
||
|
|
epsilon.max(dimensionedScalar("zero", epsilon.dimensions(), 1.0e-15));
|
||
|
|
|
||
|
|
|
||
|
|
// Turbulent kinetic energy equation
|
||
|
|
fvScalarMatrix kEqn
|
||
|
|
(
|
||
|
|
fvm::ddt(beta, k)
|
||
|
|
+ fvm::div(phib, k)
|
||
|
|
- fvm::laplacian(alphak*nuEffb, k)
|
||
|
|
==
|
||
|
|
beta*G
|
||
|
|
- fvm::Sp(beta*epsilon/k, k)
|
||
|
|
);
|
||
|
|
kEqn.relax();
|
||
|
|
kEqn.solve();
|
||
|
|
|
||
|
|
k.max(dimensionedScalar("zero", k.dimensions(), 1.0e-8));
|
||
|
|
|
||
|
|
//- Re-calculate turbulence viscosity
|
||
|
|
nutb = Cmu*sqr(k)/epsilon;
|
||
|
|
|
||
|
|
# include "wallViscosity.H"
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
nuEffa = sqr(Ct)*nutb + nua;
|
||
|
|
nuEffb = nutb + nub;
|