momentumPredictor.C

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#include "incompressibleDenseParticleFluid.H"
#include "fvcDdt.H"
#include "fvcSnGrad.H"
#include "fvcReconstruct.H"
#include "fvmDiv.H"
#include "fvmDdt.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::incompressibleDenseParticleFluid::momentumPredictor()
{
    volVectorField& Uc(Uc_);
 
    tUcEqn =
    (
        fvm::ddt(alphac, Uc) + fvm::div(alphaPhic, Uc)
      - fvm::Sp(fvc::ddt(alphac) + fvc::div(alphaPhic), Uc)
      + momentumTransport->divDevSigma(Uc)
     ==
        fvModels().source(Uc)
    );
    fvVectorMatrix& UcEqn = tUcEqn.ref();
 
    UcEqn.relax();
 
    fvConstraints().constrain(UcEqn);
 
    if (pimple.momentumPredictor())
    {
        // Face buoyancy force
        const surfaceScalarField Fgf(g & mesh.Sf());
 
        solve
        (
            UcEqn
         ==
            fvc::reconstruct
            (
                Fgf - fvc::snGrad(p)*mesh.magSf()
              - Dcf()*(phic - phid())
            )
          + Dc()*fvc::reconstruct(phic - phid())
          + Fd() - fvm::Sp(Dc(), Uc)
        );
 
        fvConstraints().constrain(Uc);
    }
}
 
 
// ************************************************************************* //