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multiphaseEuler: Improved mass transfer linearisation w.r.t pressure

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Mass transfer rates are now updated following a change in the pressure
if the mass transfer modelling provides a pressure coefficient. This
means that pimple correctors can be used to improve the behaviour of
mass transfer processes that coupled closely to the pressure field.
This commit is contained in:
Will Bainbridge
2022-11-10 13:49:13 +00:00
parent f088d89127
commit 01b4bf55ef
5 changed files with 42 additions and 8 deletions
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15
applications/solvers/modules/fluid/multiphaseEuler/multiphaseEuler/cellPressureCorrector.C
View File

@ -102,6 +102,10 @@ void Foam::solvers::multiphaseEuler::cellPressureCorrector()
// Explicit force fluxes
PtrList<surfaceScalarField> phiFs(fluid.phiFs(rAUs));
// Mass transfer rates
PtrList<volScalarField> dmdts(fluid.dmdts());
PtrList<volScalarField> d2mdtdps(fluid.d2mdtdps());
// --- Pressure corrector loop
while (pimple.correct())
{
@ -282,7 +286,7 @@ void Foam::solvers::multiphaseEuler::cellPressureCorrector()
}
// Compressible pressure equations
PtrList<fvScalarMatrix> pEqnComps(compressibilityEqns());
PtrList<fvScalarMatrix> pEqnComps(compressibilityEqns(dmdts, d2mdtdps));
// Cache p prior to solve for density update
volScalarField p_rgh_0(p_rgh);
@ -407,6 +411,15 @@ void Foam::solvers::multiphaseEuler::cellPressureCorrector()
phase.thermoRef().rho() += phase.thermo().psi()*(p_rgh - p_rgh_0);
}
// Update mass transfer rates for change in p_rgh
forAll(phases, phasei)
{
if (dmdts.set(phasei) && d2mdtdps.set(phasei))
{
dmdts[phasei] += d2mdtdps[phasei]*(p_rgh - p_rgh_0);
}
}
// Correct p_rgh for consistency with p and the updated densities
rho = fluid.rho();
p_rgh = p - rho*buoyancy.gh;

9
applications/solvers/modules/fluid/multiphaseEuler/multiphaseEuler/compressibilityEqns.C
View File

@ -34,13 +34,14 @@ License
// * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * * //
Foam::PtrList<Foam::fvScalarMatrix>
Foam::solvers::multiphaseEuler::compressibilityEqns() const
Foam::solvers::multiphaseEuler::compressibilityEqns
(
const PtrList<volScalarField>& dmdts,
const PtrList<volScalarField>& d2mdtdps
) const
{
PtrList<fvScalarMatrix> pEqnComps(phases.size());
PtrList<volScalarField> dmdts(fluid.dmdts());
PtrList<volScalarField> d2mdtdps(fluid.d2mdtdps());
forAll(phases, phasei)
{
phaseModel& phase = phases[phasei];

15
applications/solvers/modules/fluid/multiphaseEuler/multiphaseEuler/facePressureCorrector.C
View File

@ -113,6 +113,10 @@ void Foam::solvers::multiphaseEuler::facePressureCorrector()
// Explicit force fluxes
PtrList<surfaceScalarField> phiFfs(fluid.phiFfs(rAUfs));
// Mass transfer rates
PtrList<volScalarField> dmdts(fluid.dmdts());
PtrList<volScalarField> d2mdtdps(fluid.d2mdtdps());
// --- Pressure corrector loop
while (pimple.correct())
{
@ -269,7 +273,7 @@ void Foam::solvers::multiphaseEuler::facePressureCorrector()
}
// Compressible pressure equations
PtrList<fvScalarMatrix> pEqnComps(compressibilityEqns());
PtrList<fvScalarMatrix> pEqnComps(compressibilityEqns(dmdts, d2mdtdps));
// Cache p prior to solve for density update
volScalarField p_rgh_0(p_rgh);
@ -381,6 +385,15 @@ void Foam::solvers::multiphaseEuler::facePressureCorrector()
phase.thermoRef().rho() += phase.thermo().psi()*(p_rgh - p_rgh_0);
}
// Update mass transfer rates for change in p_rgh
forAll(phases, phasei)
{
if (dmdts.set(phasei) && d2mdtdps.set(phasei))
{
dmdts[phasei] += d2mdtdps[phasei]*(p_rgh - p_rgh_0);
}
}
// Correct p_rgh for consistency with p and the updated densities
rho = fluid.rho();
p_rgh = p - rho*buoyancy.gh;

6
applications/solvers/modules/fluid/multiphaseEuler/multiphaseEuler/multiphaseEuler.H
View File

@ -185,7 +185,11 @@ private:
void facePressureCorrector();
//- Return the list of pressure equation compressibility contributions
PtrList<fvScalarMatrix> compressibilityEqns() const;
PtrList<fvScalarMatrix> compressibilityEqns
(
const PtrList<volScalarField>& dmdts,
const PtrList<volScalarField>& d2mdtdps
) const;
public:

5
applications/solvers/modules/fluid/multiphaseEuler/multiphaseEuler/pressureCorrector.C
View File

@ -44,7 +44,10 @@ void Foam::solvers::multiphaseEuler::pressureCorrector()
}
else
{
PtrList<fvScalarMatrix> pEqnComps(compressibilityEqns());
PtrList<fvScalarMatrix> pEqnComps
(
compressibilityEqns(fluid.dmdts(), fluid.d2mdtdps())
);
forAll(phases, phasei)
{