momentumPredictor.C

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#include "isothermalFluid.H"
#include "fvmDiv.H"
#include "fvcGrad.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::isothermalFluid::momentumPredictor()
{
    volVectorField& U(U_);
 
    tUEqn =
    (
        fvm::ddt(rho, U) + fvm::div(phi, U)
      + MRF.DDt(rho, U)
      + momentumTransport->divDevTau(U)
     ==
        fvModels().source(rho, U)
    );
    fvVectorMatrix& UEqn = tUEqn.ref();
 
    UEqn.relax();
 
    fvConstraints().constrain(UEqn);
 
    if (pimple.momentumPredictor())
    {
        if (buoyancy.valid())
        {
            solve
            (
                UEqn
             ==
                netForce()
            );
        }
        else
        {
            solve(UEqn == -fvc::grad(p));
        }
 
        fvConstraints().constrain(U);
        K = 0.5*magSqr(U);
    }
}
 
 
// ************************************************************************* //