DistortedSphereDragForce.C

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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | Copyright (C) 2014-2016 OpenFOAM Foundation
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#include "DistortedSphereDragForce.H"

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

template<class CloudType>
Foam::scalar Foam::DistortedSphereDragForce<CloudType>::CdRe
(
    const scalar Re
) const
{
    if (Re > 1000.0)
    {
        return 0.424*Re;
    }
    else
    {
        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)
{}


// * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //

template<class CloudType>
Foam::DistortedSphereDragForce<CloudType>::~DistortedSphereDragForce()
{}


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

template<class CloudType>
Foam::forceSuSp Foam::DistortedSphereDragForce<CloudType>::calcCoupled
(
    const typename CloudType::parcelType& p,
    const scalar dt,
    const scalar mass,
    const scalar Re,
    const scalar muc
) const
{
    forceSuSp value(Zero, 0.0);

    // Limit the drop distortion to y=0 (sphere) and y=1 (disk)
    scalar y = min(max(p.y(), 0), 1);

    value.Sp() = mass*0.75*muc*CdRe(Re)*(1 + 2.632*y)/(p.rho()*sqr(p.d()));

    return value;
}


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