Relaxation.C

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    Copyright (C) 2013-2017 OpenFOAM Foundation
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License
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#include "Relaxation.H"
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::DampingModels::Relaxation<CloudType>::Relaxation
(
    const dictionary& dict,
    CloudType& owner
)
:
    DampingModel<CloudType>(dict, owner, typeName),
    uAverage_(nullptr),
    oneByTimeScaleAverage_(nullptr)
{}
 
 
template<class CloudType>
Foam::DampingModels::Relaxation<CloudType>::Relaxation
(
    const Relaxation<CloudType>& cm
)
:
    DampingModel<CloudType>(cm),
    uAverage_(nullptr),
    oneByTimeScaleAverage_(cm.oneByTimeScaleAverage_->clone())
{}
 
 
// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::DampingModels::Relaxation<CloudType>::
~Relaxation()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class CloudType>
void Foam::DampingModels::Relaxation<CloudType>::cacheFields(const bool 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>& radiusAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":radiusAverage"
            );
        const AveragingMethod<vector>& uAverage =
            mesh.lookupObject<AveragingMethod<vector>>
            (
                cloudName + ":uAverage"
            );
        const AveragingMethod<scalar>& uSqrAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":uSqrAverage"
            );
        const AveragingMethod<scalar>& frequencyAverage =
            mesh.lookupObject<AveragingMethod<scalar>>
            (
                cloudName + ":frequencyAverage"
            );
 
        uAverage_ = &uAverage;
 
        oneByTimeScaleAverage_.reset
        (
            AveragingMethod<scalar>::New
            (
                IOobject
                (
                    cloudName + ":oneByTimeScaleAverage",
                    this->owner().db().time().timeName(),
                    mesh
                ),
                this->owner().solution().dict(),
                mesh
            ).ptr()
        );
 
        oneByTimeScaleAverage_() =
        (
            this->timeScaleModel_->oneByTau
            (
                volumeAverage,
                radiusAverage,
                uSqrAverage,
                frequencyAverage
            )
        )();
    }
    else
    {
        uAverage_ = nullptr;
        oneByTimeScaleAverage_.clear();
    }
}
 
 
template<class CloudType>
Foam::vector Foam::DampingModels::Relaxation<CloudType>::velocityCorrection
(
    typename CloudType::parcelType& p,
    const scalar deltaT
) const
{
    const tetIndices tetIs(p.currentTetIndices());
 
    const scalar x =
        deltaT*oneByTimeScaleAverage_->interpolate(p.coordinates(), tetIs);
 
    const vector u = uAverage_->interpolate(p.coordinates(), tetIs);
 
    return (u - p.U())*x/(x + 2.0);
}
 
 
// ************************************************************************* //