continuityPredictor.C

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#include "isothermalFilm.H"
#include "fvcDdt.H"
#include "fvcDiv.H"
#include "fvmDdt.H"
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void Foam::solvers::isothermalFilm::continuityPredictor()
{
    // Update delta and alpha BCs for time-varying inlets etc.
    delta_.correctBoundaryConditions();
    alpha_.boundaryFieldRef() == delta.boundaryField()/VbyA.boundaryField();
 
    fvScalarMatrix alphaEqn
    (
        fvm::ddt(rho, alpha_) + fvc::div(alphaRhoPhi)
      ==
        fvModels().source(rho, alpha_)
    );
 
    alphaEqn.solve();
 
    fvConstraints().constrain(alpha_);
 
    // Remove potential unboundedness in alpha caused by div(alphaRhoPhi)
    alpha_.max(0);
 
    // Calculate the continuity error caused by limiting alpha
    // Reset to ~0 following the alpha corrector
    correctContinuityError();
 
    // Update film thickness
    correctDelta();
}
 
 
void Foam::solvers::isothermalFilm::correctContinuityError()
{
    contErr =
    (
        fvc::ddt(rho, alpha)()() + fvc::div(alphaRhoPhi)()()
      - (fvModels().source(rho, alpha) & alpha)()()
    );
}
 
 
void Foam::solvers::isothermalFilm::correctDelta()
{
    delta_ = alpha*VbyA;
    delta_.correctBoundaryConditions();
}
 
 
// ************************************************************************* //