momentumPredictor.C

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#include "shockFluid.H"
#include "fvmDdt.H"
#include "fvcDiv.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::shockFluid::momentumPredictor()
{
    volVectorField& U(U_);
 
    const surfaceVectorField phiUp
    (
        (aphiv_pos()*rhoU_pos() + aphiv_neg()*rhoU_neg())
      + (a_pos()*p_pos() + a_neg()*p_neg())*mesh.Sf()
    );
 
    // Construct the divDevTau matrix first
    // so that the maxwellSlipU BC can access the explicit part
    tmp<fvVectorMatrix> divDevTau;
    if (!inviscid)
    {
        divDevTau = momentumTransport->divDevTau(U);
    }
 
    fvVectorMatrix UEqn
    (
        fvm::ddt(rho, U) + fvc::div(phiUp)
      ==
        fvModels().source(rho, U)
    );
 
    if (!inviscid)
    {
        UEqn += divDevTau();
    }
 
    UEqn.relax();
 
    fvConstraints().constrain(UEqn);
 
    solve(UEqn);
 
    fvConstraints().constrain(U);
    K = 0.5*magSqr(U);
 
    if (!inviscid)
    {
        devTau = divDevTau->flux();
    }
}
 
 
// ************************************************************************* //