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LTSInterFoam: Allow the new time-step smoothing parameters to be input

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This commit is contained in:
Henry
2010-11-01 14:45:04 +00:00
parent 34f65f9c5a
commit 1fe653ac36
2 changed files with 44 additions and 19 deletions
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3
applications/solvers/multiphase/interFoam/LTSInterFoam/setInitialrDeltaT.H
View File

@ -14,7 +14,8 @@ volScalarField rDeltaT
IOobject::AUTO_WRITE IOobject::AUTO_WRITE
), ),
mesh, mesh,
1/dimensionedScalar("maxDeltaT", dimTime, maxDeltaT) 1/dimensionedScalar("maxDeltaT", dimTime, maxDeltaT),
zeroGradientFvPatchScalarField::typeName
); );
volScalarField rSubDeltaT volScalarField rSubDeltaT

60
applications/solvers/multiphase/interFoam/LTSInterFoam/setrDeltaT.H
View File

@ -19,6 +19,21 @@
piso.lookupOrDefault<label>("nAlphaSpreadIter", 1) piso.lookupOrDefault<label>("nAlphaSpreadIter", 1)
); );
scalar alphaSpreadDiff
(
piso.lookupOrDefault<label>("alphaSpreadDiff", 0.2)
);
scalar alphaSpreadMax
(
piso.lookupOrDefault<label>("alphaSpreadMax", 0.99)
);
scalar alphaSpreadMin
(
piso.lookupOrDefault<label>("alphaSpreadMin", 0.01)
);
label nAlphaSweepIter label nAlphaSweepIter
( (
piso.lookupOrDefault<label>("nAlphaSweepIter", 5) piso.lookupOrDefault<label>("nAlphaSweepIter", 5)
@ -36,30 +51,31 @@
volScalarField rDeltaT0 = rDeltaT; volScalarField rDeltaT0 = rDeltaT;
// Set the reciprocal time-step using an effective maximum Courant number // Set the reciprocal time-step from the local Courant number
rDeltaT = max rDeltaT.dimensionedInternalField() = max
( (
1/dimensionedScalar("maxDeltaT", dimTime, maxDeltaT), 1/dimensionedScalar("maxDeltaT", dimTime, maxDeltaT),
fvc::surfaceSum fvc::surfaceSum(mag(rhoPhi))().dimensionedInternalField()
( /((2*maxCo)*mesh.V()*rho.dimensionedInternalField())
mag(rhoPhi)*mesh.deltaCoeffs()/(maxCo*mesh.magSf())
)/rho
); );
// Limit the time-step further in the region of the interface if (maxAlphaCo < maxCo)
{ {
surfaceScalarField alphaf = fvc::interpolate(alpha1); // Further limit the reciprocal time-step
// in the vicinity of the interface
surfaceScalarField SfUfbyDelta = rDeltaT.dimensionedInternalField() = max
pos(alphaf - 0.01)*pos(0.99 - alphaf)
*mesh.surfaceInterpolation::deltaCoeffs()*mag(phi);
rDeltaT = max
( (
rDeltaT, rDeltaT.dimensionedInternalField(),
fvc::surfaceSum(mag(SfUfbyDelta/(maxAlphaCo*mesh.magSf()))) pos(alpha1.dimensionedInternalField() - 0.01)
*pos(0.99 - alpha1.dimensionedInternalField())
*fvc::surfaceSum(mag(phi))().dimensionedInternalField()
/((2*maxAlphaCo)*mesh.V())
); );
} }
// Update tho boundary values of the reciprocal time-step
rDeltaT.correctBoundaryConditions();
Info<< "Flow time scale min/max = " Info<< "Flow time scale min/max = "
<< gMin(1/rDeltaT.internalField()) << gMin(1/rDeltaT.internalField())
<< ", " << gMax(1/rDeltaT.internalField()) << endl; << ", " << gMax(1/rDeltaT.internalField()) << endl;
@ -71,12 +87,20 @@
if (nAlphaSpreadIter > 0) if (nAlphaSpreadIter > 0)
{ {
fvc::spread(rDeltaT, alpha1, nAlphaSpreadIter); fvc::spread
(
rDeltaT,
alpha1,
nAlphaSpreadIter,
alphaSpreadDiff,
alphaSpreadMax,
alphaSpreadMin
);
} }
if (nAlphaSweepIter > 0) if (nAlphaSweepIter > 0)
{ {
fvc::sweep(rDeltaT, alpha1, nAlphaSweepIter); fvc::sweep(rDeltaT, alpha1, nAlphaSweepIter, alphaSpreadDiff);
} }
Info<< "Flow time scale min/max = " Info<< "Flow time scale min/max = "