81 lines
2 KiB
C++
81 lines
2 KiB
C++
{
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volScalarField rUA = 1.0/UEqn.A();
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surfaceScalarField psisf = fvc::interpolate(psis);
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surfaceScalarField rhof = fvc::interpolate(rho);
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// Needs to be outside of loop since p is changing, but psi and rho are not.
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surfaceScalarField rhoReff = rhof - psisf*fvc::interpolate(p);
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// --- PISO loop
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while (pimple.correct())
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{
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U = rUA*UEqn.H();
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// Update boundary velocity for consistency with the flux
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mrfZones.correctBoundaryVelocity(U);
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// Calculate phi for boundary conditions
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phi = rhof*fvc::interpolate(U) & mesh.Sf();
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surfaceScalarField phid2 = rhoReff/rhof*phi;
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surfaceScalarField phid("phid", psisf/rhof*phi);
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// Make fluxes relative within the MRF zone
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mrfZones.relativeFlux(rhoReff, phi);
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mrfZones.relativeFlux(psisf, phid);
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mrfZones.relativeFlux(rhoReff, phid2);
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p.storePrevIter();
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while (pimple.correctNonOrthogonal())
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{
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fvScalarMatrix pEqn
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(
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fvm::div(phid, p)
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+ fvc::div(phid2)
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- fvm::laplacian(rho*rUA, p)
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);
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pEqn.solve();
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// Calculate the flux
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if (pimple.finalNonOrthogonalIter())
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{
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phi = phid2 + pEqn.flux();
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}
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}
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// Use incompressible continuity error check: div(rho U) = 0
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# include "continuityErrs.H"
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// Relax the pressure
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p.relax();
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U -= rUA*fvc::grad(p);
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U.correctBoundaryConditions();
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}
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// Bound the pressure
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if (min(p) < pMin || max(p) > pMax)
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{
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p.max(pMin);
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p.min(pMax);
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p.correctBoundaryConditions();
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}
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// Bound the velocity
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volScalarField magU = mag(U);
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if (max(magU) > UMax)
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{
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volScalarField Ulimiter = pos(magU - UMax)*UMax/(magU + smallU)
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+ neg(magU - UMax);
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Ulimiter.max(scalar(0));
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Ulimiter.min(scalar(1));
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U *= Ulimiter;
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U.correctBoundaryConditions();
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}
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}
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