dripping.C

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#include "dripping.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace filmEjectionModels
{
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
defineTypeNameAndDebug(dripping, 0);
addToRunTimeSelectionTable(ejectionModel, dripping, dictionary);
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
dripping::dripping
(
    const dictionary& dict,
    const solvers::isothermalFilm& film
)
:
    ejectionModel(dict, film),
    deltaStable_
    (
        dict.optionalSubDict(typeName + "Coeffs")
       .lookup<scalar>("deltaStable")
    ),
    minParticlesPerParcel_
    (
        dict.optionalSubDict(typeName + "Coeffs")
       .lookupOrDefault("minParticlesPerParcel", 1)
    ),
    rndGen_(label(0)),
    parcelDistribution_
    (
        distribution::New
        (
            dict.optionalSubDict(typeName + "Coeffs")
           .subDict("parcelDistribution"),
            rndGen_,
            0
        )
    )
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
dripping::~dripping()
{}
 
 
// * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * * //
 
void dripping::correct()
{
    const scalar piBy6 = constant::mathematical::pi/6;
 
    const scalarField gnHat(film_.nHat() & (-film_.g));
    const scalarField& magSf = film_.magSf;
 
    const scalarField& delta = film_.delta;
    const scalarField& rho = film_.rho;
 
    const scalar deltaT = film_.mesh.time().deltaTValue();
 
    forAll(delta, celli)
    {
        rate_[celli] = 0;
        diameter_[celli] = 0;
 
        // Calculate available dripping mass
        if (gnHat[celli] > small && delta[celli] > deltaStable_)
        {
            const scalar ddelta = delta[celli] - deltaStable_;
            const scalar massDrip = ddelta*rho[celli]*magSf[celli];
 
            // Sample dripped droplet diameter
            diameter_[celli] = parcelDistribution_->sample();
 
            // Calculate the minimum mass of a parcel
            const scalar minMass =
                minParticlesPerParcel_
               *rho[celli]*piBy6*pow3(diameter_[celli]);
 
            if (massDrip > minMass)
            {
                // Calculate rate of dripping
                rate_[celli] = ddelta/(deltaT*delta[celli]);
            }
        }
    }
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace filmEjectionModels
} // End namespace Foam
 
// ************************************************************************* //