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driftFluxFoam: Rationalise phase-fraction handling and implement semi-implicit MULES

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This commit is contained in:
Henry
2014-02-24 17:10:20 +00:00
committed by Andrew Heather
parent 35229643ba
commit 177b54ae94
26 changed files with 215 additions and 92 deletions
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2
applications/solvers/multiphase/driftFluxFoam/UEqn.H
View File

@ -6,7 +6,7 @@
+ fvm::div(rhoPhi, U)
+ fvc::div
(
(alpha/(scalar(1.001) - alpha))*((rhoc*rhod)/rho)*Vdj*Vdj,
(alpha1/(scalar(1.001) - alpha1))*((rho2*rho1)/rho)*Vdj*Vdj,
"div(phiVdj,Vdj)"
)
- fvm::laplacian(muEff, U)

4
applications/solvers/multiphase/driftFluxFoam/alphaControls.H
View File

@ -1,4 +0,0 @@
const dictionary& alphaControls = mesh.solverDict(alpha.name());
label nAlphaCorr(readLabel(alphaControls.lookup("nAlphaCorr")));
label nAlphaSubCycles(readLabel(alphaControls.lookup("nAlphaSubCycles")));

102
applications/solvers/multiphase/driftFluxFoam/alphaEqn.H
View File

@ -2,30 +2,118 @@
word alphaScheme("div(phi,alpha)");
word alpharScheme("div(phirb,alpha)");
if (MULESCorr)
{
fvScalarMatrix alpha1Eqn
(
#ifdef LTSSOLVE
fv::localEulerDdtScheme<scalar>(mesh, rDeltaT.name()).fvmDdt(alpha1)
#else
fv::EulerDdtScheme<scalar>(mesh).fvmDdt(alpha1)
#endif
+ fv::gaussConvectionScheme<scalar>
(
mesh,
phi,
upwind<scalar>(mesh, phi)
).fvmDiv(phi, alpha1)
- fv::gaussLaplacianScheme<scalar, scalar>
(
mesh,
linear<scalar>(mesh),
fv::uncorrectedSnGrad<scalar>(mesh)
).fvmLaplacian(fvc::interpolate(mut/rho), alpha1)
);
alpha1Eqn.solve();
Info<< "Phase-1 volume fraction = "
<< alpha1.weightedAverage(mesh.Vsc()).value()
<< " Min(alpha1) = " << min(alpha1).value()
<< " Max(alpha1) = " << max(alpha1).value()
<< endl;
tmp<surfaceScalarField> tphiAlphaUD(alpha1Eqn.flux());
phiAlpha = tphiAlphaUD();
if (alphaApplyPrevCorr && tphiAlphaCorr0.valid())
{
Info<< "Applying the previous iteration correction flux" << endl;
#ifdef LTSSOLVE
MULES::LTScorrect(alpha1, phiAlpha, tphiAlphaCorr0(), 1, 0);
#else
MULES::correct(alpha1, phiAlpha, tphiAlphaCorr0(), 1, 0);
#endif
phiAlpha += tphiAlphaCorr0();
}
// Cache the upwind-flux
tphiAlphaCorr0 = tphiAlphaUD;
}
for (int aCorr=0; aCorr<nAlphaCorr; aCorr++)
{
phiAlpha =
tmp<surfaceScalarField> tphiAlphaUn
(
fvc::flux
(
phi,
alpha,
alpha1,
alphaScheme
)
+ fvc::flux
(
phir,
alpha,
alpha1,
alpharScheme
)
);
MULES::explicitSolve(alpha, phi, phiAlpha, 1, 0);
if (MULESCorr)
{
tmp<surfaceScalarField> tphiAlphaCorr(tphiAlphaUn() - phiAlpha);
volScalarField alpha10(alpha1);
#ifdef LTSSOLVE
MULES::LTScorrect(alpha1, tphiAlphaUn(), tphiAlphaCorr(), 1, 0);
#else
MULES::correct(alpha1, tphiAlphaUn(), tphiAlphaCorr(), 1, 0);
#endif
// Under-relax the correction for all but the 1st corrector
if (aCorr == 0)
{
phiAlpha += tphiAlphaCorr();
}
else
{
alpha1 = 0.5*alpha1 + 0.5*alpha10;
phiAlpha += 0.5*tphiAlphaCorr();
}
}
else
{
phiAlpha = tphiAlphaUn;
#ifdef LTSSOLVE
MULES::explicitLTSSolve(alpha1, phi, phiAlpha, 1, 0);
#else
MULES::explicitSolve(alpha1, phi, phiAlpha, 1, 0);
#endif
}
}
if (alphaApplyPrevCorr && MULESCorr)
{
tphiAlphaCorr0 = phiAlpha - tphiAlphaCorr0;
}
alpha2 = 1.0 - alpha1;
Info<< "Phase-1 volume fraction = "
<< alpha.weightedAverage(mesh.Vsc()).value()
<< " Min(alpha) = " << min(alpha).value()
<< " Max(alpha) = " << max(alpha).value()
<< alpha1.weightedAverage(mesh.Vsc()).value()
<< " Min(alpha1) = " << min(alpha1).value()
<< " Max(alpha1) = " << max(alpha1).value()
<< endl;
}

32
applications/solvers/multiphase/driftFluxFoam/alphaEqnSubCycle.H
View File

@ -13,7 +13,7 @@
surfaceScalarField phir
(
rhoc*(mesh.Sf() & fvc::interpolate(Vdj/rho))
rho2*(mesh.Sf() & fvc::interpolate(Vdj/rho))
);
if (nAlphaSubCycles > 1)
@ -33,7 +33,7 @@
for
(
subCycle<volScalarField> alphaSubCycle(alpha, nAlphaSubCycles);
subCycle<volScalarField> alphaSubCycle(alpha1, nAlphaSubCycles);
!(++alphaSubCycle).end();
)
{
@ -50,24 +50,26 @@
// Apply the diffusion term separately to allow implicit solution
// and boundedness of the explicit advection
if (!MULESCorr)
{
fvScalarMatrix alphaEqn
fvScalarMatrix alpha1Eqn
(
fvm::ddt(alpha) - fvc::ddt(alpha)
- fvm::laplacian(mut/rho, alpha)
fvm::ddt(alpha1) - fvc::ddt(alpha1)
- fvm::laplacian(mut/rho, alpha1)
);
alphaEqn.solve();
alpha1Eqn.solve(mesh.solver("alpha1Diffusion"));
phiAlpha += alphaEqn.flux();
phiAlpha += alpha1Eqn.flux();
alpha2 = 1.0 - alpha1;
Info<< "Phase-1 volume fraction = "
<< alpha1.weightedAverage(mesh.Vsc()).value()
<< " Min(alpha1) = " << min(alpha1).value()
<< " Max(alpha1) = " << max(alpha1).value()
<< endl;
}
Info<< "Phase-1 volume fraction = "
<< alpha.weightedAverage(mesh.Vsc()).value()
<< " Min(alpha) = " << min(alpha).value()
<< " Max(alpha) = " << max(alpha).value()
<< endl;
rhoPhi = phiAlpha*(rhod - rhoc) + phi*rhoc;
rho == alpha*rhod + (scalar(1) - alpha)*rhoc;
rhoPhi = phiAlpha*(rho1 - rho2) + phi*rho2;
rho == alpha1*rho1 + alpha2*rho2;
}

6
applications/solvers/multiphase/driftFluxFoam/calcVdj.H
View File

@ -2,13 +2,13 @@ if (VdjModel == "general")
{
Vdj = V0*
(
exp(-a*max(alpha - alphaMin, scalar(0)))
- exp(-a1*max(alpha - alphaMin, scalar(0)))
exp(-a*max(alpha1 - alphaMin, scalar(0)))
- exp(-a1*max(alpha1 - alphaMin, scalar(0)))
);
}
else if (VdjModel == "simple")
{
Vdj = V0*pow(10.0, -a*max(alpha, scalar(0)));
Vdj = V0*pow(10.0, -a*max(alpha1, scalar(0)));
}
else
{

4
applications/solvers/multiphase/driftFluxFoam/correctViscosity.H
View File

@ -4,7 +4,7 @@
(
plasticViscosityCoeff,
plasticViscosityExponent,
alpha
alpha1
);
if (BinghamPlastic)
@ -14,7 +14,7 @@
yieldStressCoeff,
yieldStressExponent,
yieldStressOffset,
alpha
alpha1
);
mul =

20
applications/solvers/multiphase/driftFluxFoam/createFields.H
View File

@ -12,12 +12,12 @@
mesh
);
Info<< "Reading field alpha\n" << endl;
volScalarField alpha
Info<< "Reading field alpha1\n" << endl;
volScalarField alpha1
(
IOobject
(
"alpha",
"alpha1",
runTime.timeName(),
mesh,
IOobject::MUST_READ,
@ -26,6 +26,8 @@
mesh
);
volScalarField alpha2("alpha2", scalar(1) - alpha1);
Info<< "Reading field U\n" << endl;
volVectorField U
(
@ -58,9 +60,8 @@
);
dimensionedScalar rhoc(transportProperties.lookup("rhoc"));
dimensionedScalar rhod(transportProperties.lookup("rhod"));
dimensionedScalar rho1(transportProperties.lookup("rho1"));
dimensionedScalar rho2(transportProperties.lookup("rho2"));
dimensionedScalar muc(transportProperties.lookup("muc"));
dimensionedScalar muMax(transportProperties.lookup("muMax"));
@ -102,7 +103,7 @@
IOobject::NO_READ,
IOobject::NO_WRITE
),
alpha*rhod + (scalar(1) - alpha)*rhoc
alpha1*rho1 + alpha2*rho2
);
rho.oldTime();
@ -136,7 +137,7 @@
(
plasticViscosityCoeff,
plasticViscosityExponent,
alpha
alpha1
)
);
@ -382,3 +383,6 @@
);
p_rgh = p - rho*gh;
}
tmp<surfaceScalarField> tphiAlphaCorr0;

2
applications/solvers/multiphase/driftFluxFoam/driftFluxFoam.C
View File

@ -45,6 +45,8 @@ Description
#include "pimpleControl.H"
#include "fvIOoptionList.H"
#include "fixedFluxPressureFvPatchScalarField.H"
#include "gaussLaplacianScheme.H"
#include "uncorrectedSnGrad.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

2
applications/solvers/multiphase/driftFluxFoam/wallViscosity.H
View File

@ -3,7 +3,7 @@
const scalar kappa_ = kappa.value();
const scalar E_ = E.value();
const scalar muc_ = muc.value();
const scalar nuc_ = muc_/rhoc.value();
const scalar nuc_ = muc_/rho2.value();
const fvPatchList& patches = mesh.boundary();

4
applications/solvers/multiphase/driftFluxFoam/yieldStress.H
View File

@ -3,7 +3,7 @@ volScalarField yieldStress
const dimensionedScalar& yieldStressCoeff,
const dimensionedScalar& yieldStressExponent,
const dimensionedScalar& yieldStressOffset,
const volScalarField& alpha
const volScalarField& alpha1
)
{
tmp<volScalarField> tfld
@ -13,7 +13,7 @@ volScalarField yieldStress
pow
(
10.0,
yieldStressExponent*(max(alpha, scalar(0)) + yieldStressOffset)
yieldStressExponent*(max(alpha1, scalar(0)) + yieldStressOffset)
)
- pow
(

2
tutorials/multiphase/driftFluxFoam/ras/dahl/0/alpha → tutorials/multiphase/driftFluxFoam/ras/dahl/0/alpha1
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class volScalarField;
object alpha;
object alpha1;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

5
tutorials/multiphase/driftFluxFoam/ras/dahl/constant/transportProperties
View File

@ -31,9 +31,8 @@ yieldStressOffset yieldStressOffset [ 0 0 0 0 0 0 0 ] 0;
muMax muMax [ 1 -1 -1 0 0 0 0 ] 10.0;
rhoc rhoc [ 1 -3 0 0 0 0 0 ] 996;
rhod rhod [ 1 -3 0 0 0 0 0 ] 1996;
rho1 rho1 [ 1 -3 0 0 0 0 0 ] 1996;
rho2 rho2 [ 1 -3 0 0 0 0 0 ] 996;
VdjModel simple;

2
tutorials/multiphase/driftFluxFoam/ras/dahl/system/controlDict
View File

@ -47,7 +47,7 @@ runTimeModifiable yes;
adjustTimeStep on;
maxCo 1;
maxCo 5;
maxDeltaT 1;

4
tutorials/multiphase/driftFluxFoam/ras/dahl/system/fvSchemes
View File

@ -32,7 +32,7 @@ divSchemes
div(rhoPhi,U) Gauss linearUpwind grad(U);
div(phiVdj,Vdj) Gauss linear;
div(phi,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss linear;
div(rhoPhi,k) Gauss limitedLinear 1;
div(rhoPhi,epsilon) Gauss limitedLinear 1;
@ -58,7 +58,7 @@ fluxRequired
{
default no;
p_rgh;
alpha;
alpha1;
}

32
tutorials/multiphase/driftFluxFoam/ras/dahl/system/fvSolution
View File

@ -17,10 +17,14 @@ FoamFile
solvers
{
"alpha.*"
"alpha1.*"
{
nAlphaCorr 1;
nAlphaSubCycles 4;
nAlphaCorr 2;
nAlphaSubCycles 1;
MULESCorr yes;
nLimiterIter 3;
alphaApplyPrevCorr yes;
solver smoothSolver;
smoother symGaussSeidel;
@ -29,6 +33,15 @@ solvers
minIter 1;
}
alpha1Diffusion
{
solver PCG;
preconditioner DIC;
tolerance 1e-6;
relTol 0;
minIter 1;
}
p_rgh
{
solver GAMG;
@ -49,7 +62,8 @@ solvers
"(U|k|epsilon)"
{
solver smoothSolver;
solver PBiCG;
preconditioner DILU;
smoother symGaussSeidel;
tolerance 1e-7;
relTol 0.1;
@ -65,20 +79,16 @@ solvers
PIMPLE
{
nCorrectors 2;
momentumPredictor no;
nCorrectors 3;
nNonOrthogonalCorrectors 0;
}
relaxationFactors
{
fields
{
}
equations
{
"U.*" 1;
"k.*" 1;
"epsilon.*" 1;
".*" 1;
}
}

2
tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/0/alpha → tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/0/alpha1
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class volScalarField;
object alpha;
object alpha1;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

5
tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/constant/transportProperties
View File

@ -31,9 +31,8 @@ yieldStressOffset yieldStressOffset [ 0 0 0 0 0 0 0 ] 0;
muMax muMax [ 1 -1 -1 0 0 0 0 ] 10.0;
rhoc rhoc [ 1 -3 0 0 0 0 0 ] 996;
rhod rhod [ 1 -3 0 0 0 0 0 ] 1996;
rho1 rho1 [ 1 -3 0 0 0 0 0 ] 1996;
rho2 rho2 [ 1 -3 0 0 0 0 0 ] 996;
VdjModel simple;

3
tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/system/controlDict
View File

@ -47,8 +47,7 @@ runTimeModifiable yes;
adjustTimeStep yes;
maxCo 0.5;
maxAlphaCo 0.5;
maxCo 1;
maxDeltaT 0.05;

6
tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/system/fvSchemes
View File

@ -32,7 +32,7 @@ divSchemes
div(rhoPhi,U) Gauss linearUpwind grad(U);
div(phiVdj,Vdj) Gauss linear;
div(phi,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss linear;
div(rhoPhi,k) Gauss limitedLinear 1;
div(rhoPhi,epsilon) Gauss limitedLinear 1;
@ -57,8 +57,8 @@ snGradSchemes
fluxRequired
{
default no;
p_rgh ;
alpha ;
p_rgh;
alpha1;
}

22
tutorials/multiphase/driftFluxFoam/ras/mixerVessel2D/system/fvSolution
View File

@ -17,15 +17,29 @@ FoamFile
solvers
{
"alpha.*"
"alpha1.*"
{
nAlphaCorr 1;
nAlphaSubCycles 3;
nAlphaCorr 2;
nAlphaSubCycles 1;
MULESCorr yes;
nLimiterIter 3;
alphaApplyPrevCorr yes;
solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-6;
relTol 0;
minIter 1;
}
alpha1Diffusion
{
solver PCG;
preconditioner DIC;
tolerance 1e-6;
relTol 0;
minIter 1;
}
"rho.*"
@ -71,7 +85,7 @@ solvers
PIMPLE
{
momentumPredictor yes;
momentumPredictor no;
nCorrectors 3;
nNonOrthogonalCorrectors 0;

4
tutorials/multiphase/driftFluxFoam/ras/tank3D/0/U
View File

@ -136,8 +136,8 @@ boundaryField
OUTL15
{
type inletOutlet;
inletValue uniform (0 0 0);
type pressureInletOutletVelocity;
value uniform (0 0 0);
}
}

2
tutorials/multiphase/driftFluxFoam/ras/tank3D/0/alpha → tutorials/multiphase/driftFluxFoam/ras/tank3D/0/alpha1
View File

@ -10,7 +10,7 @@ FoamFile
version 2.0;
format ascii;
class volScalarField;
object alpha;
object alpha1;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

5
tutorials/multiphase/driftFluxFoam/ras/tank3D/constant/transportProperties
View File

@ -31,9 +31,8 @@ yieldStressOffset yieldStressOffset [ 0 0 0 0 0 0 0 ] 0;
muMax muMax [ 1 -1 -1 0 0 0 0 ] 10.0;
rhoc rhoc [ 1 -3 0 0 0 0 0 ] 1000;
rhod rhod [ 1 -3 0 0 0 0 0 ] 1042;
rho1 rho1 [ 1 -3 0 0 0 0 0 ] 1042;
rho2 rho2 [ 1 -3 0 0 0 0 0 ] 1000;
VdjModel simple;

6
tutorials/multiphase/driftFluxFoam/ras/tank3D/system/controlDict
View File

@ -25,7 +25,7 @@ stopAt endTime;
endTime 8000;
deltaT 0.1;
deltaT 0.5;
writeControl runTime;
@ -33,11 +33,11 @@ writeInterval 50;
purgeWrite 0;
writeFormat ascii;
writeFormat binary;
writePrecision 6;
writeCompression compressed;
writeCompression uncompressed;
timeFormat general;

4
tutorials/multiphase/driftFluxFoam/ras/tank3D/system/fvSchemes
View File

@ -32,7 +32,7 @@ divSchemes
div(rhoPhi,U) Gauss linearUpwind grad(U);
div(phiVdj,Vdj) Gauss linear;
div(phi,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss vanLeer;
div(phirb,alpha) Gauss linear;
div(rhoPhi,k) Gauss limitedLinear 1;
div(rhoPhi,epsilon) Gauss limitedLinear 1;
@ -58,7 +58,7 @@ fluxRequired
{
default no;
p_rgh;
alpha;
alpha1;
}

25
tutorials/multiphase/driftFluxFoam/ras/tank3D/system/fvSolution
View File

@ -17,10 +17,14 @@ FoamFile
solvers
{
"alpha.*"
"alpha1.*"
{
nAlphaCorr 1;
nAlphaSubCycles 4;
nAlphaCorr 2;
nAlphaSubCycles 1;
MULESCorr yes;
nLimiterIter 3;
alphaApplyPrevCorr yes;
solver smoothSolver;
smoother symGaussSeidel;
@ -29,6 +33,15 @@ solvers
minIter 1;
}
alpha1Diffusion
{
solver PCG;
preconditioner DIC;
tolerance 1e-6;
relTol 0;
minIter 1;
}
p_rgh
{
solver GAMG;
@ -65,15 +78,13 @@ solvers
PIMPLE
{
nCorrectors 2;
momentumPredictor no;
nCorrectors 3;
nNonOrthogonalCorrectors 0;
}
relaxationFactors
{
fields
{
}
equations
{
".*" 1;