DistortedSphereDragForce.C

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    Copyright (C) 2021 OpenCFD Ltd.
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#include "DistortedSphereDragForce.H"

// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //

template<class CloudType>
Foam::scalar Foam::DistortedSphereDragForce<CloudType>::CdRe
(
    const scalar Re
) const
{
    // (AOB:Eq. 35; LMR:Eq. 9)
    if (Re > 1000.0)
    {
        return 0.424*Re;
    }

    return 24.0*(1.0 + (1.0/6.0)*pow(Re, 2.0/3.0));
}


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

template<class CloudType>
Foam::DistortedSphereDragForce<CloudType>::DistortedSphereDragForce
(
    CloudType& owner,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    ParticleForce<CloudType>(owner, mesh, dict, typeName, false)
{}


template<class CloudType>
Foam::DistortedSphereDragForce<CloudType>::DistortedSphereDragForce
(
    const DistortedSphereDragForce<CloudType>& df
)
:
    ParticleForce<CloudType>(df)
{}


// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //

template<class CloudType>
Foam::forceSuSp Foam::DistortedSphereDragForce<CloudType>::calcCoupled
(
    const typename CloudType::parcelType& p,
    const typename CloudType::parcelType::trackingData& td,
    const scalar dt,
    const scalar mass,
    const scalar Re,
    const scalar muc
) const
{
    // Limit the drop distortion to y=0 (sphere) and y=1 (disk)
    const scalar y = clamp(p.y(), zero_one{});

    // (LMR:Eq. 10)
    return
        forceSuSp
        (
            Zero,
            mass*0.75*muc*CdRe(Re)*(1.0 + 2.632*y)/(p.rho()*sqr(p.d()))
        );
}


// ************************************************************************* //