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MULES: nLimiterIter and smoothLimiter are now user-input via the corresponding fvSolution sub-dict

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nLimiterIter: Number of iterations during limiter construction
    3 (default) is sufficient for 3D simulations with a Courant number 0.5 or so
    For larger Courant numbers larger values may be needed but this is
    only relevant for IMULES and CMULES

smoothLimiter: Coefficient to smooth the limiter to avoid "diamond"
    staggering patters seen in regions of low particle phase-fraction in
    fluidised-bed simulations.

    The default is 0 as it is not needed for all simulations.
    A value of 0.1 is appropriate for fluidised-bed simulations.
    The useful range is 0 -> 0.5.
    Values larger than 0.5 may cause excessive smearing of the solution.
This commit is contained in:
Henry
2015-04-29 14:37:41 +01:00
parent 01efa0b4c3
commit 3e2b64c08d
18 changed files with 103 additions and 72 deletions
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1
applications/solvers/multiphase/compressibleMultiphaseInterFoam/multiphaseMixtureThermo/multiphaseMixtureThermo.C
View File

@ -996,7 +996,6 @@ void Foam::multiphaseMixtureThermo::solveAlphas
zeroField(),
1,
0,
3,
true
);

6
applications/solvers/multiphase/interFoam/interMixingFoam/alphaEqns.H
View File

@ -83,8 +83,7 @@
zeroField(),
zeroField(),
1,
0,
3
0
);
// Create the complete flux for alpha2
@ -125,8 +124,7 @@
zeroField(),
zeroField(),
1,
0,
3
0
);
// Construct the limited fluxes

1
applications/solvers/multiphase/multiphaseEulerFoam/multiphaseSystem/multiphaseSystem.C
View File

@ -158,7 +158,6 @@ void Foam::multiphaseSystem::solveAlphas()
zeroField(),
1,
0,
3,
true
);

6
src/finiteVolume/fvMatrices/solvers/MULES/CMULES.H
View File

@ -129,8 +129,7 @@ void limiterCorr
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
);
template<class RdeltaTType, class RhoType, class SpType, class SuType>
@ -144,8 +143,7 @@ void limitCorr
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
);

59
src/finiteVolume/fvMatrices/solvers/MULES/CMULESTemplates.C
View File

@ -89,13 +89,6 @@ void Foam::MULES::correct
const fvMesh& mesh = psi.mesh();
const scalar rDeltaT = 1.0/mesh.time().deltaTValue();
const dictionary& MULEScontrols = mesh.solverDict(psi.name());
label nLimiterIter
(
readLabel(MULEScontrols.lookup("nLimiterIter"))
);
limitCorr
(
rDeltaT,
@ -103,9 +96,10 @@ void Foam::MULES::correct
psi,
phi,
phiCorr,
Sp, Su,
psiMax, psiMin,
nLimiterIter
Sp,
Su,
psiMax,
psiMin
);
correct(rDeltaT, rho, psi, phi, phiCorr, Sp, Su);
@ -130,13 +124,6 @@ void Foam::MULES::LTScorrect
const volScalarField& rDeltaT =
mesh.objectRegistry::lookupObject<volScalarField>("rSubDeltaT");
const dictionary& MULEScontrols = mesh.solverDict(psi.name());
label nLimiterIter
(
readLabel(MULEScontrols.lookup("nLimiterIter"))
);
limitCorr
(
rDeltaT,
@ -144,9 +131,10 @@ void Foam::MULES::LTScorrect
psi,
phi,
phiCorr,
Sp, Su,
psiMax, psiMin,
nLimiterIter
Sp,
Su,
psiMax,
psiMin
);
correct(rDeltaT, rho, psi, phi, phiCorr, Sp, Su);
}
@ -164,8 +152,7 @@ void Foam::MULES::limiterCorr
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
)
{
const scalarField& psiIf = psi;
@ -175,9 +162,19 @@ void Foam::MULES::limiterCorr
const dictionary& MULEScontrols = mesh.solverDict(psi.name());
label nLimiterIter
(
readLabel(MULEScontrols.lookup("nLimiterIter"))
);
scalar smoothLimiter
(
MULEScontrols.lookupOrDefault<scalar>("smoothLimiter", 0)
);
scalar extremaCoeff
(
MULEScontrols.lookupOrDefault<scalar>("extremaCoeff", 0.0)
MULEScontrols.lookupOrDefault<scalar>("extremaCoeff", 0)
);
const labelUList& owner = mesh.owner();
@ -294,9 +291,13 @@ void Foam::MULES::limiterCorr
psiMaxn = min(psiMaxn + extremaCoeff*(psiMax - psiMin), psiMax);
psiMinn = max(psiMinn - extremaCoeff*(psiMax - psiMin), psiMin);
// scalar smooth = 0.5;
// psiMaxn = min((1.0 - smooth)*psiIf + smooth*psiMaxn, psiMax);
// psiMinn = max((1.0 - smooth)*psiIf + smooth*psiMinn, psiMin);
if (smoothLimiter > SMALL)
{
psiMaxn =
min(smoothLimiter*psiIf + (1.0 - smoothLimiter)*psiMaxn, psiMax);
psiMinn =
max(smoothLimiter*psiIf + (1.0 - smoothLimiter)*psiMinn, psiMin);
}
psiMaxn =
V
@ -483,8 +484,7 @@ void Foam::MULES::limitCorr
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
)
{
const fvMesh& mesh = psi.mesh();
@ -519,8 +519,7 @@ void Foam::MULES::limitCorr
Sp,
Su,
psiMax,
psiMin,
nLimiterIter
psiMin
);
phiCorr *= lambda;

8
src/finiteVolume/fvMatrices/solvers/MULES/IMULESTemplates.C
View File

@ -77,11 +77,6 @@ void Foam::MULES::implicitSolve
readLabel(MULEScontrols.lookup("maxIter"))
);
label nLimiterIter
(
readLabel(MULEScontrols.lookup("nLimiterIter"))
);
scalar maxUnboundedness
(
readScalar(MULEScontrols.lookup("maxUnboundedness"))
@ -187,8 +182,7 @@ void Foam::MULES::implicitSolve
Sp,
Su,
psiMax,
psiMin,
nLimiterIter
psiMin
);
solve

4
src/finiteVolume/fvMatrices/solvers/MULES/MULES.H
View File

@ -138,8 +138,7 @@ void limiter
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
);
template<class RdeltaTType, class RhoType, class SpType, class SuType>
@ -154,7 +153,6 @@ void limit
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter,
const bool returnCorr
);

66
src/finiteVolume/fvMatrices/solvers/MULES/MULESTemplates.C
View File

@ -108,8 +108,23 @@ void Foam::MULES::explicitSolve
{
const fvMesh& mesh = psi.mesh();
const scalar rDeltaT = 1.0/mesh.time().deltaTValue();
psi.correctBoundaryConditions();
limit(rDeltaT, rho, psi, phi, phiPsi, Sp, Su, psiMax, psiMin, 3, false);
limit
(
rDeltaT,
rho,
psi,
phi,
phiPsi,
Sp,
Su,
psiMax,
psiMin,
false
);
explicitSolve(rDeltaT, rho, psi, phiPsi, Sp, Su);
}
@ -133,7 +148,21 @@ void Foam::MULES::explicitLTSSolve
mesh.objectRegistry::lookupObject<volScalarField>("rSubDeltaT");
psi.correctBoundaryConditions();
limit(rDeltaT, rho, psi, phi, phiPsi, Sp, Su, psiMax, psiMin, 3, false);
limit
(
rDeltaT,
rho,
psi,
phi,
phiPsi,
Sp,
Su,
psiMax,
psiMin,
false
);
explicitSolve(rDeltaT, rho, psi, phiPsi, Sp, Su);
}
@ -150,17 +179,28 @@ void Foam::MULES::limiter
const SpType& Sp,
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter
const scalar psiMin
)
{
const scalarField& psiIf = psi;
const volScalarField::GeometricBoundaryField& psiBf = psi.boundaryField();
const scalarField& psi0 = psi.oldTime();
const fvMesh& mesh = psi.mesh();
const dictionary& MULEScontrols = mesh.solverDict(psi.name());
label nLimiterIter
(
MULEScontrols.lookupOrDefault<label>("nLimiterIter", 3)
);
scalar smoothLimiter
(
MULEScontrols.lookupOrDefault<scalar>("smoothLimiter", 0)
);
const scalarField& psi0 = psi.oldTime();
const labelUList& owner = mesh.owner();
const labelUList& neighb = mesh.neighbour();
tmp<volScalarField::DimensionedInternalField> tVsc = mesh.Vsc();
@ -284,9 +324,13 @@ void Foam::MULES::limiter
psiMaxn = min(psiMaxn, psiMax);
psiMinn = max(psiMinn, psiMin);
//scalar smooth = 0.5;
//psiMaxn = min((1.0 - smooth)*psiIf + smooth*psiMaxn, psiMax);
//psiMinn = max((1.0 - smooth)*psiIf + smooth*psiMinn, psiMin);
if (smoothLimiter > SMALL)
{
psiMaxn =
min(smoothLimiter*psiIf + (1.0 - smoothLimiter)*psiMaxn, psiMax);
psiMinn =
max(smoothLimiter*psiIf + (1.0 - smoothLimiter)*psiMinn, psiMin);
}
if (mesh.moving())
{
@ -502,7 +546,6 @@ void Foam::MULES::limit
const SuType& Su,
const scalar psiMax,
const scalar psiMin,
const label nLimiterIter,
const bool returnCorr
)
{
@ -543,8 +586,7 @@ void Foam::MULES::limit
Sp,
Su,
psiMax,
psiMin,
nLimiterIter
psiMin
);
if (returnCorr)

2
tutorials/multiphase/multiphaseEulerFoam/bubbleColumn/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 2;
}

2
tutorials/multiphase/multiphaseEulerFoam/damBreak4phase/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 3;
}

2
tutorials/multiphase/multiphaseEulerFoam/damBreak4phaseFine/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 3;
}

2
tutorials/multiphase/multiphaseEulerFoam/mixerVessel2D/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 2;
}

2
tutorials/multiphase/multiphaseInterDyMFoam/laminar/mixerVesselAMI2D/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 1;
cAlpha 1;

2
tutorials/multiphase/multiphaseInterFoam/laminar/damBreak4phase/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 4;
cAlpha 2;

2
tutorials/multiphase/multiphaseInterFoam/laminar/damBreak4phaseFine/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaSubCycles 4;
cAlpha 2;

2
tutorials/multiphase/multiphaseInterFoam/laminar/mixerVessel2D/system/fvSolution
View File

@ -17,7 +17,7 @@ FoamFile
solvers
{
alpha
"alpha.*"
{
nAlphaCorr 4;
nAlphaSubCycles 4;

4
tutorials/multiphase/twoPhaseEulerFoam/RAS/fluidisedBed/system/fvSolution
View File

@ -21,8 +21,10 @@ solvers
{
nAlphaCorr 1;
nAlphaSubCycles 2;
implicitPhasePressure yes;
smoothLimiter 0.1;
implicitPhasePressure yes;
solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-9;

4
tutorials/multiphase/twoPhaseEulerFoam/laminar/fluidisedBed/system/fvSolution
View File

@ -21,8 +21,10 @@ solvers
{
nAlphaCorr 1;
nAlphaSubCycles 2;
implicitPhasePressure yes;
smoothLimiter 0.1;
implicitPhasePressure yes;
solver smoothSolver;
smoother symGaussSeidel;
tolerance 1e-9;