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twoPhaseEulerFoam: Changes pEqn into phase mass-conservative form (at convergence)

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This commit is contained in:
Henry
2013-10-20 19:48:51 +01:00
parent c17da5116d
commit 6a2d8b7e2f
1 changed files with 25 additions and 17 deletions
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42
applications/solvers/multiphase/twoPhaseEulerFoam/pEqn.H
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@ -34,6 +34,7 @@
fvc::interpolate((1.0/rho1)*rAU1*phase1.turbulence().pPrime())
*fvc::snGrad(alpha1)*mesh.magSf()
);
phiP1.boundaryField() == 0;
// Phase-2 pressure flux (e.g. due to particle-particle pressure)
surfaceScalarField phiP2
@ -42,6 +43,7 @@
fvc::interpolate((1.0/rho2)*rAU2*phase2.turbulence().pPrime())
*fvc::snGrad(alpha2)*mesh.magSf()
);
phiP2.boundaryField() == 0;
surfaceScalarField phiHbyA1
(
@ -126,9 +128,11 @@
);
pEqnComp1 =
fvc::ddt(rho1)
+ fvc::div(phi1, rho1) - fvc::Sp(fvc::div(phi1), rho1)
+ correction
(
fvc::ddt(alpha1, rho1) + fvc::div(alphaPhi1, rho1)
- fvc::Sp(fvc::ddt(alpha1) + fvc::div(alphaPhi1), rho1)
)/rho1
+ (alpha1/rho1)*correction
(
psi1*fvm::ddt(p)
+ fvm::div(phid1, p) - fvm::Sp(fvc::div(phid1), p)
@ -137,9 +141,11 @@
pEqnComp1().relax();
pEqnComp2 =
fvc::ddt(rho2)
+ fvc::div(phi2, rho2) - fvc::Sp(fvc::div(phi2), rho2)
+ correction
(
fvc::ddt(alpha2, rho2) + fvc::div(alphaPhi2, rho2)
- fvc::Sp(fvc::ddt(alpha2) + fvc::div(alphaPhi2), rho2)
)/rho2
+ (alpha2/rho2)*correction
(
psi2*fvm::ddt(p)
+ fvm::div(phid2, p) - fvm::Sp(fvc::div(phid2), p)
@ -150,12 +156,18 @@
else
{
pEqnComp1 =
fvc::ddt(rho1) + psi1*correction(fvm::ddt(p))
+ fvc::div(phi1, rho1) - fvc::Sp(fvc::div(phi1), rho1);
(
fvc::ddt(alpha1, rho1) + fvc::div(alphaPhi1, rho1)
- fvc::Sp(fvc::ddt(alpha1) + fvc::div(alphaPhi1), rho1)
)/rho1
+ (alpha1*psi1/rho1)*correction(fvm::ddt(p));
pEqnComp2 =
fvc::ddt(rho2) + psi2*correction(fvm::ddt(p))
+ fvc::div(phi2, rho2) - fvc::Sp(fvc::div(phi2), rho2);
(
fvc::ddt(alpha2, rho2) + fvc::div(alphaPhi2, rho2)
- fvc::Sp(fvc::ddt(alpha2) + fvc::div(alphaPhi2), rho2)
)/rho2
+ (alpha2*psi2/rho2)*correction(fvm::ddt(p));
}
// Cache p prior to solve for density update
@ -171,11 +183,7 @@
solve
(
(
(alpha1/rho1)*pEqnComp1()
+ (alpha2/rho2)*pEqnComp2()
)
+ pEqnIncomp,
pEqnComp1() + pEqnComp2() + pEqnIncomp,
mesh.solver(p.select(pimple.finalInnerIter()))
);
@ -201,8 +209,8 @@
fluid.dgdt() =
(
pos(alpha2)*(pEqnComp2 & p)/rho2
- pos(alpha1)*(pEqnComp1 & p)/rho1
pos(alpha2)*(pEqnComp2 & p)/max(alpha2, scalar(1e-3))
- pos(alpha1)*(pEqnComp1 & p)/max(alpha1, scalar(1e-3))
);
p.relax();