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reactingEulerFoam: Removed continuity error from species equations

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This fixes a consistency issue in the interface-composition method, and
also seems to improve stability/convergence of the pimple iteration in
the presence of significant mass transfer.
This commit is contained in:
Will Bainbridge
2018-05-25 12:05:53 +01:00
parent 5aac095b2b
commit c259eac3e7
6 changed files with 28 additions and 13 deletions
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4
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/PhaseSystems/MomentumTransferPhaseSystem/MomentumTransferPhaseSystem.C
View File

@ -167,6 +167,10 @@ addMassTransferMomentumTransfer(phaseSystem::momentumTransferTable& eqns) const
continue;
}
// Note that the phase UEqn contains a continuity error term, which
// implicitly adds a mass transfer term of fvm::Sp(dmdt, U). These
// additions do not include this term.
const volScalarField dmdt(this->dmdt(pair));
if (!pair.phase1().stationary())

4
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/PhaseSystems/OneResistanceHeatTransferPhaseSystem/OneResistanceHeatTransferPhaseSystem.C
View File

@ -129,6 +129,10 @@ heatTransfer() const
const volScalarField K1(phase1.K());
const volScalarField K2(phase2.K());
// Note that the phase heEqn contains a continuity error term, which
// implicitly adds a mass transfer term of fvm::Sp(dmdt, he). These
// additions do not include this term.
const volScalarField dmdt(this->dmdt(pair));
const volScalarField dmdt21(posPart(dmdt));
const volScalarField dmdt12(negPart(dmdt));

7
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/PhaseSystems/PhaseTransferPhaseSystem/PhaseTransferPhaseSystem.C
View File

@ -161,6 +161,9 @@ Foam::PhaseTransferPhaseSystem<BasePhaseSystem>::massTransfer() const
const phaseModel& phase = pair.phase1();
const phaseModel& otherPhase = pair.phase2();
// Note that the phase YiEqn does not contain a continuity error term,
// so these additions represent the entire mass transfer
const volScalarField dmdt(this->rDmdt(pair));
const volScalarField dmdt12(negPart(dmdt));
const volScalarField dmdt21(posPart(dmdt));
@ -181,11 +184,11 @@ Foam::PhaseTransferPhaseSystem<BasePhaseSystem>::massTransfer() const
*eqns[name] +=
dmdt21*eqns[otherName]->psi()
- fvm::Sp(dmdt21, eqns[name]->psi());
+ fvm::Sp(dmdt12, eqns[name]->psi());
*eqns[otherName] -=
dmdt12*eqns[name]->psi()
- fvm::Sp(dmdt12, eqns[otherName]->psi());
+ fvm::Sp(dmdt21, eqns[otherName]->psi());
}
}

7
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/PhaseSystems/PopulationBalancePhaseSystem/PopulationBalancePhaseSystem.C
View File

@ -192,6 +192,9 @@ Foam::PopulationBalancePhaseSystem<BasePhaseSystem>::massTransfer() const
const phaseModel& phase = pair.phase1();
const phaseModel& otherPhase = pair.phase2();
// Note that the phase YiEqn does not contain a continuity error term,
// so these additions represent the entire mass transfer
const volScalarField dmdt(this->pDmdt(pair));
const volScalarField dmdt12(negPart(dmdt));
const volScalarField dmdt21(posPart(dmdt));
@ -212,11 +215,11 @@ Foam::PopulationBalancePhaseSystem<BasePhaseSystem>::massTransfer() const
*eqns[name] +=
dmdt21*eqns[otherName]->psi()
- fvm::Sp(dmdt21, eqns[name]->psi());
+ fvm::Sp(dmdt12, eqns[name]->psi());
*eqns[otherName] -=
dmdt12*eqns[name]->psi()
- fvm::Sp(dmdt12, eqns[otherName]->psi());
+ fvm::Sp(dmdt21, eqns[otherName]->psi());
}
}

18
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/PhaseSystems/ThermalPhaseChangePhaseSystem/ThermalPhaseChangePhaseSystem.C
View File

@ -283,6 +283,11 @@ Foam::ThermalPhaseChangePhaseSystem<BasePhaseSystem>::massTransfer() const
forAll(Yi, i)
{
if (Yi[i].member() != volatile_)
{
continue;
}
const word name
(
IOobject::groupName(volatile_, phase.name())
@ -293,16 +298,13 @@ Foam::ThermalPhaseChangePhaseSystem<BasePhaseSystem>::massTransfer() const
IOobject::groupName(volatile_, otherPhase.name())
);
// Note that the phase YiEqn does not contain a continuity error
// term, so these additions represent the entire mass transfer
const volScalarField dmdt(this->iDmdt(pair) + this->wDmdt(pair));
*eqns[name] -= fvm::Sp(dmdt, eqns[name]->psi());
*eqns[otherName] += fvm::Sp(dmdt, eqns[otherName]->psi());
if (Yi[i].member() == volatile_)
{
*eqns[name] += dmdt;
*eqns[otherName] -= dmdt;
}
*eqns[name] += dmdt;
*eqns[otherName] -= dmdt;
}
}

1
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/phaseModel/MultiComponentPhaseModel/MultiComponentPhaseModel.C
View File

@ -155,7 +155,6 @@ Foam::MultiComponentPhaseModel<BasePhaseModel>::YiEqn(volScalarField& Yi)
(
fvm::ddt(alpha, rho, Yi)
+ fvm::div(alphaRhoPhi, Yi, "div(" + alphaRhoPhi.name() + ",Yi)")
- fvm::Sp(this->continuityError(), Yi)
- fvm::laplacian
(