Explicit.C

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    Copyright (C) 2020 OpenCFD Ltd.
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    This file is part of OpenFOAM.
 
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#include "Explicit.H"
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::PackingModels::Explicit<CloudType>::Explicit
(
    const dictionary& dict,
    CloudType& owner
)
:
    PackingModel<CloudType>(dict, owner, typeName),
    stressAverage_(nullptr),
    correctionLimiting_
    (
        CorrectionLimitingMethod::New
        (
            this->coeffDict().subDict(CorrectionLimitingMethod::typeName)
        )
    )
{}
 
 
template<class CloudType>
Foam::PackingModels::Explicit<CloudType>::Explicit
(
    const Explicit<CloudType>& cm
)
:
    PackingModel<CloudType>(cm),
    stressAverage_(cm.stressAverage_->clone()),
    correctionLimiting_
    (
        cm.correctionLimiting_->clone()
    )
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::PackingModels::Explicit<CloudType>::~Explicit()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class CloudType>
void Foam::PackingModels::Explicit<CloudType>::cacheFields(const bool store)
{
    PackingModel<CloudType>::cacheFields(store);
 
    if (store)
    {
        const fvMesh& mesh = this->owner().mesh();
        const word& cloudName = this->owner().name();
 
        const AveragingMethod<scalar>& volumeAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":volumeAverage"
            );
        const AveragingMethod<scalar>& rhoAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":rhoAverage"
            );
        const AveragingMethod<vector>& uAverage =
            mesh.lookupObject<AveragingMethod<vector>>
            (
                cloudName + ":uAverage"
            );
        const AveragingMethod<scalar>& uSqrAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":uSqrAverage"
            );
 
        volumeAverage_ = &volumeAverage;
        uAverage_ = &uAverage;
 
        stressAverage_.reset
        (
            AveragingMethod<scalar>::New
            (
                IOobject
                (
                    cloudName + ":stressAverage",
                    this->owner().db().time().timeName(),
                    mesh
                ),
                this->owner().solution().dict(),
                mesh
            ).ptr()
        );
 
        stressAverage_() =
            this->particleStressModel_->tau
            (
                *volumeAverage_,
                rhoAverage,
                uSqrAverage
            )();
    }
    else
    {
        volumeAverage_ = nullptr;
        uAverage_ = nullptr;
        stressAverage_.clear();
    }
}
 
 
template<class CloudType>
Foam::vector Foam::PackingModels::Explicit<CloudType>::velocityCorrection
(
    typename CloudType::parcelType& p,
    const scalar deltaT
) const
{
    const tetIndices tetIs(p.currentTetIndices());
 
    // interpolated quantities
    const scalar alpha =
        this->volumeAverage_->interpolate(p.coordinates(), tetIs);
 
    const vector alphaGrad =
        this->volumeAverage_->interpolateGrad(p.coordinates(), tetIs);
 
    const vector uMean =
        this->uAverage_->interpolate(p.coordinates(), tetIs);
 
    // stress gradient
    const vector tauGrad =
        stressAverage_->interpolateGrad(p.coordinates(), tetIs);
 
    // parcel relative velocity
    const vector uRelative = p.U() - uMean;
 
    // correction velocity
    vector dU = Zero;
 
    //const scalar Re = p.Re(td);
    //const typename CloudType::forceType& forces = this->owner().forces();
    //const forceSuSp F =
    //    forces.calcCoupled(p, td, deltaT, p.mass(), Re, td.muc())
    //  + forces.calcNonCoupled(p, td, deltaT, p.mass(), Re, td.muc());
 
    // correction velocity
    if ((uRelative & alphaGrad) > 0)
    {
        dU = - deltaT*tauGrad/(p.rho()*(alpha + SMALL)/* + deltaT*F.Sp()*/);
    }
 
    // apply the velocity limiters
    return
        correctionLimiting_->limitedVelocity
        (
            p.U(),
            dU,
            uMean
        );
}
 
 
// ************************************************************************* //