densityChange.C

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#include "densityChange.H"
#include "addToRunTimeSelectionTable.H"
#include "phaseSystem.H"
#include "fvcDdt.H"
#include "fvcDiv.H"
#include "fvcSup.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace diameterModels
{
namespace driftModels
{
    defineTypeNameAndDebug(densityChangeDrift, 0);
    addToRunTimeSelectionTable(driftModel, densityChangeDrift, dictionary);
}
}
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::diameterModels::driftModels::densityChangeDrift::densityChangeDrift
(
    const populationBalanceModel& popBal,
    const dictionary& dict
)
:
    driftModel(popBal, dict)
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

void Foam::diameterModels::driftModels::densityChangeDrift::addToDriftRate
(
    volScalarField& driftRate,
    const label i
)
{
    const sizeGroup& fi = popBal_.sizeGroups()[i];
    const phaseModel& phase = fi.phase();
    const volScalarField& alpha = phase;
    const volScalarField& rho = phase.thermo().rho();

    driftRate -=
        fi.x()/(rho*max(alpha, phase.residualAlpha()))
       *(
            fvc::ddt(alpha, rho) + fvc::div(phase.alphaRhoPhi())
          - fvc::Sp(fvc::ddt(alpha) + fvc::div(phase.alphaPhi()), rho)
        );
}


// ************************************************************************* //