zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Multi-phase solvers: Improved handling of inflow/outflow BCs in MULES

Browse Source 
Avoids slight phase-fraction unboundedness at entertainment BCs and improved
robustness.

Additionally the phase-fractions in the multi-phase (rather than two-phase)
solvers are adjusted to avoid the slow growth of inconsistency ("drift") caused
by solving for all of the phase-fractions rather than deriving one from the
others.
This commit is contained in:
Henry Weller
2017-01-17 22:43:47 +00:00
parent 1abec0652d
commit 1c2093c8b3
24 changed files with 214 additions and 606 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
applications/solvers/multiphase/twoPhaseEulerFoam/twoPhaseSystem/phaseModel/phaseModel.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2017 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -248,27 +248,19 @@ bool Foam::phaseModel::read(const dictionary& phaseProperties)
}
void Foam::phaseModel::correctInflowFlux(surfaceScalarField& alphaPhi) const
void Foam::phaseModel::correctInflowOutflow(surfaceScalarField& alphaPhi) const
{
surfaceScalarField::Boundary& alphaPhiBf = alphaPhi.boundaryFieldRef();
const volScalarField::Boundary& alphaBf = boundaryField();
const surfaceScalarField::Boundary& phiBf = phi().boundaryField();
// Ensure that the flux at inflow BCs is preserved
forAll(alphaPhiBf, patchi)
{
fvsPatchScalarField& alphaPhip = alphaPhiBf[patchi];
if (!alphaPhip.coupled())
{
const scalarField& phip = phi().boundaryField()[patchi];
const scalarField& alphap = boundaryField()[patchi];
forAll(alphaPhip, facei)
{
if (phip[facei] < SMALL)
{
alphaPhip[facei] = alphap[facei]*phip[facei];
}
}
alphaPhip = phiBf[patchi]*alphaBf[patchi];
}
}
}

6
applications/solvers/multiphase/twoPhaseEulerFoam/twoPhaseSystem/phaseModel/phaseModel.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2011-2017 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -319,8 +319,8 @@ public:
return alphaRhoPhi_;
}
//- Ensure that the flux at inflow BCs is preserved
void correctInflowFlux(surfaceScalarField& alphaPhi) const;
//- Ensure that the flux at inflow/outflow BCs is preserved
void correctInflowOutflow(surfaceScalarField& alphaPhi) const;
//- Correct the phase properties
// other than the thermodynamics and turbulence

13
applications/solvers/multiphase/twoPhaseEulerFoam/twoPhaseSystem/twoPhaseSystem.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2013-2016 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2013-2017 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -444,7 +444,7 @@ void Foam::twoPhaseSystem::solve()
)
);
phase1_.correctInflowFlux(alphaPhic1);
phase1_.correctInflowOutflow(alphaPhic1);
if (nAlphaSubCycles > 1)
{
@ -515,8 +515,7 @@ void Foam::twoPhaseSystem::solve()
fvc::interpolate(phase1_.rho())*phase1_.alphaPhi();
phase2_.alphaPhi() = phi_ - phase1_.alphaPhi();
alpha2 = scalar(1) - alpha1;
phase2_.correctInflowFlux(phase2_.alphaPhi());
phase2_.correctInflowOutflow(phase2_.alphaPhi());
phase2_.alphaRhoPhi() =
fvc::interpolate(phase2_.rho())*phase2_.alphaPhi();
@ -525,6 +524,12 @@ void Foam::twoPhaseSystem::solve()
<< " Min(" << alpha1.name() << ") = " << min(alpha1).value()
<< " Max(" << alpha1.name() << ") = " << max(alpha1).value()
<< endl;
// Ensure the phase-fractions are bounded
alpha1.max(0);
alpha1.min(1);
alpha2 = scalar(1) - alpha1;
}
}