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ENH: Updated pressureGradientExplicitSource

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This commit is contained in:
andy
2012-12-10 10:13:19 +00:00
parent 15b52c7ec5
commit 5527055a1c
2 changed files with 24 additions and 20 deletions
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34
src/fieldSources/derived/pressureGradientExplicitSource/pressureGradientExplicitSource.C
View File

@ -46,7 +46,7 @@ namespace Foam
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * // // * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
void Foam::pressureGradientExplicitSource::writeGradP() const void Foam::pressureGradientExplicitSource::writeProps(const scalar gradP) const
{ {
// Only write on output time // Only write on output time
if (mesh_.time().outputTime()) if (mesh_.time().outputTime())
@ -63,7 +63,7 @@ void Foam::pressureGradientExplicitSource::writeGradP() const
IOobject::NO_WRITE IOobject::NO_WRITE
) )
); );
propsDict.add("gradient", gradP_); propsDict.add("gradient", gradP);
propsDict.regIOobject::write(); propsDict.regIOobject::write();
} }
} }
@ -81,8 +81,8 @@ Foam::pressureGradientExplicitSource::pressureGradientExplicitSource
: :
basicSource(sourceName, modelType, dict, mesh), basicSource(sourceName, modelType, dict, mesh),
Ubar_(coeffs_.lookup("Ubar")), Ubar_(coeffs_.lookup("Ubar")),
gradPini_(coeffs_.lookup("gradPini")), gradP0_(0.0),
gradP_(gradPini_), dGradP_(0.0),
flowDir_(Ubar_/mag(Ubar_)), flowDir_(Ubar_/mag(Ubar_)),
invAPtr_(NULL) invAPtr_(NULL)
{ {
@ -95,7 +95,7 @@ Foam::pressureGradientExplicitSource::pressureGradientExplicitSource
"Foam::pressureGradientExplicitSource::" "Foam::pressureGradientExplicitSource::"
"pressureGradientExplicitSource" "pressureGradientExplicitSource"
"(" "("
"onst word&, " "const word&, "
"const word&, " "const word&, "
"const dictionary&, " "const dictionary&, "
"const fvMesh&" "const fvMesh&"
@ -116,10 +116,10 @@ Foam::pressureGradientExplicitSource::pressureGradientExplicitSource
{ {
Info<< " Reading pressure gradient from file" << endl; Info<< " Reading pressure gradient from file" << endl;
dictionary propsDict(dictionary::null, propsFile); dictionary propsDict(dictionary::null, propsFile);
propsDict.lookup("gradient") >> gradP_; propsDict.lookup("gradient") >> gradP0_;
} }
Info<< " Initial pressure gradient = " << gradP_ << nl << endl; Info<< " Initial pressure gradient = " << gradP0_ << nl << endl;
} }
@ -151,22 +151,21 @@ void Foam::pressureGradientExplicitSource::correct(volVectorField& U)
// Calculate the pressure gradient increment needed to adjust the average // Calculate the pressure gradient increment needed to adjust the average
// flow-rate to the desired value // flow-rate to the desired value
scalar gradPplus = (mag(Ubar_) - magUbarAve)/rAUave; dGradP_ = (mag(Ubar_) - magUbarAve)/rAUave;
// Apply correction to velocity field // Apply correction to velocity field
forAll(cells_, i) forAll(cells_, i)
{ {
label cellI = cells_[i]; label cellI = cells_[i];
U[cellI] += flowDir_*rAU[cellI]*gradPplus; U[cellI] += flowDir_*rAU[cellI]*dGradP_;
} }
// Update pressure gradient scalar gradP = gradP0_ + dGradP_;
gradP_.value() += gradPplus;
Info<< "Pressure gradient source: uncorrected Ubar = " << magUbarAve Info<< "Pressure gradient source: uncorrected Ubar = " << magUbarAve
<< ", pressure gradient = " << gradP_.value() << endl; << ", pressure gradient = " << gradP << endl;
writeGradP(); writeProps(gradP);
} }
@ -187,10 +186,12 @@ void Foam::pressureGradientExplicitSource::addSup
IOobject::NO_WRITE IOobject::NO_WRITE
), ),
mesh_, mesh_,
dimensionedVector("zero", gradP_.dimensions(), vector::zero) dimensionedVector("zero", eqn.dimensions()/dimVolume, vector::zero)
); );
UIndirectList<vector>(Su, cells_) = flowDir_*gradP_.value(); scalar gradP = gradP0_ + dGradP_;
UIndirectList<vector>(Su, cells_) = flowDir_*gradP;
eqn += Su; eqn += Su;
} }
@ -224,6 +225,9 @@ void Foam::pressureGradientExplicitSource::setValue
{ {
invAPtr_() = 1.0/eqn.A(); invAPtr_() = 1.0/eqn.A();
} }
gradP0_ += dGradP_;
dGradP_ = 0.0;
} }

10
src/fieldSources/derived/pressureGradientExplicitSource/pressureGradientExplicitSource.H
View File

@ -73,11 +73,11 @@ class pressureGradientExplicitSource
//- Average velocity //- Average velocity
vector Ubar_; vector Ubar_;
//- Initial pressure gradient //- Pressure gradient before correction
dimensionedScalar gradPini_; scalar gradP0_;
//- Pressure gradient //- Change in pressure gradient
dimensionedScalar gradP_; scalar dGradP_;
//- Flow direction //- Flow direction
vector flowDir_; vector flowDir_;
@ -89,7 +89,7 @@ class pressureGradientExplicitSource
// Private Member Functions // Private Member Functions
//- Write the pressure gradient to file (for restarts etc) //- Write the pressure gradient to file (for restarts etc)
void writeGradP() const; void writeProps(const scalar gradP) const;
//- Correct driving force for a constant mass flow rate //- Correct driving force for a constant mass flow rate
void update(fvMatrix<vector>& eqn); void update(fvMatrix<vector>& eqn);