momentumPredictor.C

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#include "multiphaseEuler.H"
#include "fvmSup.H"
 
// * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * * //
 
void Foam::solvers::multiphaseEuler::cellMomentumPredictor()
{
    Info<< "Constructing momentum equations" << endl;
 
    phaseSystem& fluid(fluid_);
 
    autoPtr<phaseSystem::momentumTransferTable>
        momentumTransferPtr(fluid.momentumTransfer());
 
    phaseSystem::momentumTransferTable&
        momentumTransfer(momentumTransferPtr());
 
    forAll(movingPhases, movingPhasei)
    {
        phaseModel& phase = movingPhases_[movingPhasei];
 
        const volScalarField& alpha = phase;
        const volScalarField& rho = phase.rho();
        volVectorField& U = phase.URef();
 
        UEqns.set
        (
            phase.index(),
            new fvVectorMatrix
            (
                phase.UEqn()
             ==
               *momentumTransfer[phase.name()]
              + fvModels().source(alpha, rho, U)
            )
        );
 
        UEqns[phase.index()].relax();
        fvConstraints().constrain(UEqns[phase.index()]);
        U.correctBoundaryConditions();
        fvConstraints().constrain(U);
    }
}
 
 
void Foam::solvers::multiphaseEuler::faceMomentumPredictor()
{
    Info<< "Constructing face momentum equations" << endl;
 
    phaseSystem& fluid(fluid_);
 
    autoPtr<phaseSystem::momentumTransferTable>
        momentumTransferPtr(fluid.momentumTransferf());
 
    phaseSystem::momentumTransferTable&
        momentumTransfer(momentumTransferPtr());
 
    forAll(movingPhases, movingPhasei)
    {
        phaseModel& phase = movingPhases_[movingPhasei];
 
        const volScalarField& alpha = phase;
        const volScalarField& rho = phase.rho();
        volVectorField& U = phase.URef();
 
        UEqns.set
        (
            phase.index(),
            new fvVectorMatrix
            (
                phase.UfEqn()
             ==
               *momentumTransfer[phase.name()]
              + fvModels().source(alpha, rho, U)
            )
        );
 
        UEqns[phase.index()].relax();
        fvConstraints().constrain(UEqns[phase.index()]);
        U.correctBoundaryConditions();
        fvConstraints().constrain(U);
    }
}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::multiphaseEuler::momentumPredictor()
{
    if (pimple.flow())
    {
        UEqns.setSize(phases.size());
 
        if (faceMomentum)
        {
            faceMomentumPredictor();
        }
        else
        {
            cellMomentumPredictor();
        }
    }
}
 
 
// ************************************************************************* //