108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
tmp<fv::convectionScheme<scalar> > mvConvection
|
|
(
|
|
fv::convectionScheme<scalar>::New
|
|
(
|
|
mesh,
|
|
fields,
|
|
phi,
|
|
mesh.schemesDict().divScheme("div(phi,ft_b_h_hu)")
|
|
)
|
|
);
|
|
|
|
volScalarField Db("Db", turbulence->muEff());
|
|
|
|
if (ign.ignited())
|
|
{
|
|
// Calculate the unstrained laminar flame speed
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
Su = unstrainedLaminarFlameSpeed()();
|
|
|
|
const volScalarField& Xi = flameWrinkling->Xi();
|
|
|
|
// progress variable
|
|
// ~~~~~~~~~~~~~~~~~
|
|
volScalarField c("c", 1.0 - b);
|
|
|
|
// Unburnt gas density
|
|
// ~~~~~~~~~~~~~~~~~~~
|
|
volScalarField rhou = thermo.rhou();
|
|
|
|
// Calculate flame normal etc.
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
//volVectorField n = fvc::grad(b);
|
|
volVectorField n = fvc::reconstruct(fvc::snGrad(b)*mesh.magSf());
|
|
|
|
volScalarField mgb("mgb", mag(n));
|
|
|
|
dimensionedScalar dMgb("dMgb", mgb.dimensions(), SMALL);
|
|
|
|
{
|
|
volScalarField bc = b*c;
|
|
|
|
dMgb += 1.0e-3*
|
|
(bc*mgb)().weightedAverage(mesh.V())
|
|
/(bc.weightedAverage(mesh.V()) + SMALL);
|
|
}
|
|
|
|
mgb += dMgb;
|
|
|
|
surfaceVectorField Sfhat = mesh.Sf()/mesh.magSf();
|
|
surfaceVectorField nfVec = fvc::interpolate(n);
|
|
nfVec += Sfhat*(fvc::snGrad(b) - (Sfhat & nfVec));
|
|
nfVec /= (mag(nfVec) + dMgb);
|
|
surfaceScalarField nf("nf", mesh.Sf() & nfVec);
|
|
n /= mgb;
|
|
|
|
# include "StCorr.H"
|
|
|
|
// Calculate turbulent flame speed flux
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
surfaceScalarField phiSt("phiSt", fvc::interpolate(rhou*StCorr*St)*nf);
|
|
|
|
# include "StCourantNo.H"
|
|
|
|
Db = flameWrinkling->Db();
|
|
|
|
// Create b equation
|
|
// ~~~~~~~~~~~~~~~~~
|
|
fvScalarMatrix bEqn
|
|
(
|
|
betav*fvm::ddt(rho, b)
|
|
+ mvConvection->fvmDiv(phi, b)
|
|
+ fvm::div(phiSt, b)
|
|
- fvm::Sp(fvc::div(phiSt), b)
|
|
- fvm::laplacian(Db, b)
|
|
);
|
|
|
|
|
|
// Add ignition cell contribution to b-equation
|
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
# include "ignite.H"
|
|
|
|
// Solve for b
|
|
// ~~~~~~~~~~~
|
|
bEqn.solve();
|
|
|
|
Info<< "min(b) = " << min(b).value() << endl;
|
|
|
|
if (composition.contains("ft"))
|
|
{
|
|
volScalarField& ft = composition.Y("ft");
|
|
|
|
Info<< "Combustion progress = "
|
|
<< 100*(1.0 - b)().weightedAverage(mesh.V()*ft).value() << "%"
|
|
<< endl;
|
|
}
|
|
else
|
|
{
|
|
Info<< "Combustion progress = "
|
|
<< 100*(1.0 - b)().weightedAverage(mesh.V()).value() << "%"
|
|
<< endl;
|
|
}
|
|
|
|
// Correct the flame-wrinkling
|
|
flameWrinkling->correct(mvConvection);
|
|
|
|
St = Xi*Su;
|
|
}
|