tmp<Foam::fvVectorMatrix> kinematicSingleLayer::solveMomentum
(
const volScalarField& pu,
const volScalarField& pp
)
{
if (debug)
{
InfoInFunction << endl;
}
// Momentum
tmp<fvVectorMatrix> tUEqn
(
fvm::ddt(deltaRho_, U_)
+ fvm::div(phi_, U_)
==
- USp_
// - fvm::SuSp(rhoSp_, U_)
- rhoSp_*U_
+ forces_.correct(U_)
+ turbulence_->Su(U_)
);
fvVectorMatrix& UEqn = tUEqn.ref();
UEqn.relax();
if (momentumPredictor_)
{
solve
(
UEqn
==
fvc::reconstruct
(
- fvc::interpolate(delta_)
* (
regionMesh().magSf()
* (
fvc::snGrad(pu, "snGrad(p)")
+ fvc::snGrad(pp, "snGrad(p)")*fvc::interpolate(delta_)
+ fvc::snGrad(delta_)*fvc::interpolate(pp)
)
- fvc::flux(rho_*gTan())
)
)
);
// Remove any patch-normal components of velocity
U_ -= nHat()*(nHat() & U_);
U_.correctBoundaryConditions();
}
return tUEqn;
}
int main(int argc, char *argv[])
{
#include "setRootCase.H"
#include "createTime.H"
#include "createMesh.H"
simpleControl simple(mesh);
#include "createFields.H"
#include "initContinuityErrs.H"
Info<< "\nStarting time loop\n" << endl;
while (simple.loop())
{
Info<< "Time = " << runTime.timeName() << nl << endl;
curvature.correctBoundaryConditions();
/** temperature equation */
fvScalarMatrix TEqn(
fvm::laplacian(0.5 * gamma2 * sqrt(T), T) == fvc::div(U)
);
TEqn.solve();
/** SIMPLE algorithm for solving pressure-velocity equations */
/** velocity predictor */
tmp<fvVectorMatrix> tUEqn(
fvm::div(phi, U)
- fvm::laplacian(0.5 * gamma1 * sqrt(T), U) ==
0.5 * gamma1 * fvc::div(sqrt(T) * dev2(::T(fvc::grad(U))))
);
fvVectorMatrix& UEqn = tUEqn.ref();
UEqn.relax();
solve(UEqn ==
fvc::reconstruct((
- fvc::snGrad(p2)
+ gamma7 * fvc::snGrad(T) * fvc::interpolate(
(U / gamma2 / sqrt(T) - 0.25*fvc::grad(T)) & fvc::grad(T)/T
)
) * mesh.magSf())
);
/** pressure corrector */
volScalarField rAU(1./UEqn.A());
surfaceScalarField rAUbyT("rhorAUf", fvc::interpolate(rAU / T));
volVectorField HbyA("HbyA", U);
HbyA = rAU * UEqn.H();
tUEqn.clear();
surfaceScalarField phiHbyA("phiHbyA", fvc::interpolate(HbyA / T) & mesh.Sf());
adjustPhi(phiHbyA, U, p2);
surfaceScalarField phif(
gamma7 * rAUbyT * fvc::snGrad(T) * mesh.magSf() * fvc::interpolate(
(U / gamma2 / sqrt(T) - 0.25*fvc::grad(T)) & fvc::grad(T)/T
)
);
phiHbyA += phif;
// Update the fixedFluxPressure BCs to ensure flux consistency
setSnGrad<fixedFluxPressureFvPatchScalarField>
(
p2.boundaryFieldRef(),
phiHbyA.boundaryField()
/ (mesh.magSf().boundaryField() * rAUbyT.boundaryField())
);
while (simple.correctNonOrthogonal()) {
fvScalarMatrix pEqn(
fvm::laplacian(rAUbyT, p2) == fvc::div(phiHbyA)
);
pEqn.setReference(pRefCell, getRefCellValue(p2, pRefCell));
pEqn.solve();
if (simple.finalNonOrthogonalIter()) {
// Calculate the conservative fluxes
phi = phiHbyA - pEqn.flux();
p2.relax();
/** velocity corrector */
U = HbyA + rAU * fvc::reconstruct((phif - pEqn.flux()) / rAUbyT);
U.correctBoundaryConditions();
}
}
#include "continuityErrs.H"
// Pressure is defined up to a constant factor,
// we adjust it to maintain the initial domainIntegrate
p2 += (initialPressure - fvc::domainIntegrate(p2)) / totalVolume;
runTime.write();
Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
<< " ClockTime = " << runTime.elapsedClockTime() << " s"
<< nl << endl;
}
Info<< "End\n" << endl;
return 0;
}
