16ea621887
The rewrite enables multiple pressure/velocity systems to be treated in a time and under-relaxation consistent way (useful for multiphase flows).
56 lines
1.4 KiB
C++
56 lines
1.4 KiB
C++
{
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p.boundaryField().updateCoeffs();
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// Prepare clean 1/a_p without time derivative and under-relaxation
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// contribution
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rAU = 1.0/HUEqn.A();
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// Calculate U from convection-diffusion matrix
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U = rAU*HUEqn.H();
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// Consistently calculate flux
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pimple.calcTransientConsistentFlux(phi, U, rAU, ddtUEqn);
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// Global flux balance
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adjustPhi(phi, U, p);
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// Non-orthogonal pressure corrector loop
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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::laplacian
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(
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fvc::interpolate(rAU)/pimple.aCoeff(U.name()),
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p,
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"laplacian(rAU," + p.name() + ')'
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)
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==
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fvc::div(phi)
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);
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pEqn.setReference(pRefCell, pRefValue);
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pEqn.solve
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(
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mesh.solutionDict().solver(p.select(pimple.finalInnerIter()))
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);
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if (pimple.finalNonOrthogonalIter())
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{
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phi -= pEqn.flux();
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}
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}
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// Explicitly relax pressure for momentum corrector except for last
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// corrector
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if (!pimple.finalIter())
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{
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p.relax();
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}
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# include "continuityErrs.H"
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// Consistently reconstruct velocity after pressure equation. Note: flux is
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// made relative inside the function
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pimple.reconstructTransientVelocity(U, phi, ddtUEqn, rAU, p);
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}
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