Files
openfoam/applications/solvers/combustion/engineFoam/pEqn.H
Henry Weller 77b03e2e0c Specialized dotInterpolate for the efficient calculation of flux fields
e.g. (fvc::interpolate(HbyA) & mesh.Sf()) -> fvc::flux(HbyA)

This removes the need to create an intermediate face-vector field when
computing fluxes which is more efficient, reduces the peak storage and
improved cache coherency in addition to providing a simpler and cleaner
API.
2016-04-06 20:20:53 +01:00

98 lines
2.1 KiB
C

rho = thermo.rho();
volScalarField rAU(1.0/UEqn.A());
surfaceScalarField rhorAUf("rhorAUf", fvc::interpolate(rho*rAU));
volVectorField HbyA(constrainHbyA(rAU*UEqn.H(), U, p));
if (pimple.transonic())
{
surfaceScalarField phid
(
"phid",
fvc::interpolate(psi)
*(
(
fvc::flux(HbyA)
+ rhorAUf*fvc::ddtCorr(rho, U, rhoUf)/fvc::interpolate(rho)
)
)
);
fvc::makeRelative(phid, psi, U);
MRF.makeRelative(fvc::interpolate(psi), phid);
while (pimple.correctNonOrthogonal())
{
fvScalarMatrix pEqn
(
fvm::ddt(psi, p)
+ fvm::div(phid, p)
- fvm::laplacian(rhorAUf, p)
==
fvOptions(psi, p, rho.name())
);
pEqn.solve(mesh.solver(p.select(pimple.finalInnerIter())));
if (pimple.finalNonOrthogonalIter())
{
phi == pEqn.flux();
}
}
}
else
{
surfaceScalarField phiHbyA
(
"phiHbyA",
(
fvc::flux(rho*HbyA)
+ rhorAUf*fvc::ddtCorr(rho, U, rhoUf)
)
);
fvc::makeRelative(phiHbyA, rho, U);
MRF.makeRelative(fvc::interpolate(rho), phiHbyA);
// Update the pressure BCs to ensure flux consistency
constrainPressure(p, rho, U, phiHbyA, rhorAUf, MRF);
while (pimple.correctNonOrthogonal())
{
fvScalarMatrix pEqn
(
fvm::ddt(psi, p)
+ fvc::div(phiHbyA)
- fvm::laplacian(rhorAUf, p)
==
fvOptions(psi, p, rho.name())
);
pEqn.solve(mesh.solver(p.select(pimple.finalInnerIter())));
if (pimple.finalNonOrthogonalIter())
{
phi = phiHbyA + pEqn.flux();
}
}
}
#include "rhoEqn.H"
#include "compressibleContinuityErrs.H"
U = HbyA - rAU*fvc::grad(p);
U.correctBoundaryConditions();
fvOptions.correct(U);
K = 0.5*magSqr(U);
{
rhoUf = fvc::interpolate(rho*U);
surfaceVectorField n(mesh.Sf()/mesh.magSf());
rhoUf += n*(fvc::absolute(phi, rho, U)/mesh.magSf() - (n & rhoUf));
}
if (thermo.dpdt())
{
dpdt = fvc::ddt(p) - fvc::div(fvc::meshPhi(rho, U), p);
}