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foam-extend4.1-coherent-io/applications/solvers/immersedBoundary/simpleIbFoam/pEqn.H

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p.boundaryField().updateCoeffs();
volScalarField AU = UEqn().A();
U = UEqn().H()/AU;
// Immersed boundary update
U.correctBoundaryConditions();
UEqn.clear();
phi = faceIbMask*(fvc::interpolate(U) & mesh.Sf());
// Adjust immersed boundary fluxes
immersedBoundaryAdjustPhi(phi, U);
adjustPhi(phi, U, p);
// Non-orthogonal pressure corrector loop
for (int nonOrth = 0; nonOrth <= nNonOrthCorr; nonOrth++)
{
fvScalarMatrix pEqn
(
fvm::laplacian(1.0/AU, p) == fvc::div(phi)
);
pEqn.setReference(pRefCell, pRefValue);
// Retain the residual from the first iteration
if (nonOrth == 0)
{
eqnResidual = pEqn.solve().initialResidual();
maxResidual = max(eqnResidual, maxResidual);
}
else
{
pEqn.solve();
}
if (nonOrth == nNonOrthCorr)
{
phi -= pEqn.flux();
}
}
# include "immersedBoundaryContinuityErrs.H"
// Explicitly relax pressure for momentum corrector
p.relax();
// Momentum corrector
U -= fvc::grad(p)/AU;
U.correctBoundaryConditions();