ParamagneticForce.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
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    Copyright (C) 2011-2017 OpenFOAM Foundation
    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
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#include "ParamagneticForce.H"
#include "demandDrivenData.H"
#include "electromagneticConstants.H"

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

template<class CloudType>
Foam::ParamagneticForce<CloudType>::ParamagneticForce
(
    CloudType& owner,
    const fvMesh& mesh,
    const dictionary& dict
)
:
    ParticleForce<CloudType>(owner, mesh, dict, typeName, true),
    HdotGradHName_
    (
        this->coeffs().template getOrDefault<word>("HdotGradH", "HdotGradH")
    ),
    HdotGradHInterpPtr_(nullptr),
    magneticSusceptibility_
    (
        this->coeffs().getScalar("magneticSusceptibility")
    )
{}


template<class CloudType>
Foam::ParamagneticForce<CloudType>::ParamagneticForce
(
    const ParamagneticForce& pf
)
:
    ParticleForce<CloudType>(pf),
    HdotGradHName_(pf.HdotGradHName_),
    HdotGradHInterpPtr_(pf.HdotGradHInterpPtr_),
    magneticSusceptibility_(pf.magneticSusceptibility_)
{}


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

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


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

template<class CloudType>
void Foam::ParamagneticForce<CloudType>::cacheFields(const bool store)
{
    if (store)
    {
        const volVectorField& HdotGradH =
            this->mesh().template lookupObject<volVectorField>(HdotGradHName_);

        HdotGradHInterpPtr_ = interpolation<vector>::New
        (
            this->owner().solution().interpolationSchemes(),
            HdotGradH
        ).ptr();
    }
    else
    {
        deleteDemandDrivenData(HdotGradHInterpPtr_);
    }
}


template<class CloudType>
Foam::forceSuSp Foam::ParamagneticForce<CloudType>::calcNonCoupled
(
    const typename CloudType::parcelType& p,
    const typename CloudType::parcelType::trackingData& td,
    const scalar dt,
    const scalar mass,
    const scalar Re,
    const scalar muc
) const
{
    forceSuSp value(Zero);

    const interpolation<vector>& HdotGradHInterp = *HdotGradHInterpPtr_;

    value.Su()=
        mass*3.0*constant::electromagnetic::mu0.value()/p.rho()
       *magneticSusceptibility_/(magneticSusceptibility_ + 3)
       *HdotGradHInterp.interpolate(p.coordinates(), p.currentTetIndices());

    return value;
}


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