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added pressure reference

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This commit is contained in:
andy
2009-09-02 17:55:42 +01:00
parent 40e22860e9
commit 906a0458da
2 changed files with 12 additions and 3 deletions
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12
src/postProcessing/functionObjects/forces/forces/forces.C
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@ -190,6 +190,7 @@ Foam::forces::forces
directForceDensity_(false),
fDName_(""),
rhoRef_(VGREAT),
pRef_(0),
CofR_(vector::zero),
forcesFilePtr_(NULL)
{
@ -282,13 +283,15 @@ void Foam::forces::read(const dictionary& dict)
Info<< " or " << rhoName_;
}
Info<< " in database." << nl
<< " De-activating forces."
Info<< " in database." << nl << " De-activating forces."
<< endl;
}
// Reference density needed for incompressible calculations
rhoRef_ = readScalar(dict.lookup("rhoInf"));
// Reference pressure, 0 by default
pRef_ = dict.lookupOrDefault<scalar>("pRef", 0.0);
}
// Centre of rotation for moment calculations
@ -443,13 +446,16 @@ Foam::forces::forcesMoments Foam::forces::calcForcesMoment() const
const volSymmTensorField::GeometricBoundaryField& devRhoReffb
= tdevRhoReff().boundaryField();
// Scale pRef by density for incompressible simulations
scalar pRef = pRef_/rho(p);
forAllConstIter(labelHashSet, patchSet_, iter)
{
label patchi = iter.key();
vectorField Md = mesh.C().boundaryField()[patchi] - CofR_;
vectorField pf = Sfb[patchi]*p.boundaryField()[patchi];
vectorField pf = Sfb[patchi]*(p.boundaryField()[patchi] - pRef);
fm.first().first() += rho(p)*sum(pf);
fm.second().first() += rho(p)*sum(Md ^ pf);

3
src/postProcessing/functionObjects/forces/forces/forces.H
View File

@ -144,6 +144,9 @@ protected:
//- Reference density needed for incompressible calculations
scalar rhoRef_;
//- Reference pressure
scalar pRef_;
//- Centre of rotation
vector CofR_;