LiftForce.C

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    Copyright (C) 2012-2017 OpenFOAM Foundation
    Copyright (C) 2020 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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#include "LiftForce.H"
#include "fvcCurl.H"
 
// * * * * * * * * * * * * Protected Member Functions  * * * * * * * * * * * //
 
template<class CloudType>
Foam::scalar Foam::LiftForce<CloudType>::LiftForce::Cl
(
    const typename CloudType::parcelType& p,
    const typename CloudType::parcelType::trackingData& td,
    const vector& curlUc,
    const scalar Re,
    const scalar muc
) const
{
    // dummy
    return 0.0;
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::LiftForce<CloudType>::LiftForce
(
    CloudType& owner,
    const fvMesh& mesh,
    const dictionary& dict,
    const word& forceType
)
:
    ParticleForce<CloudType>(owner, mesh, dict, forceType, true),
    UName_(this->coeffs().template getOrDefault<word>("U", "U")),
    curlUcInterpPtr_(nullptr)
{}
 
 
template<class CloudType>
Foam::LiftForce<CloudType>::LiftForce(const LiftForce& lf)
:
    ParticleForce<CloudType>(lf),
    UName_(lf.UName_),
    curlUcInterpPtr_(nullptr)
{}
 
 
// * * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * //
 
template<class CloudType>
Foam::LiftForce<CloudType>::~LiftForce()
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class CloudType>
void Foam::LiftForce<CloudType>::cacheFields(const bool store)
{
    static word fName("curlUcDt");
 
    bool fieldExists = this->mesh().template foundObject<volVectorField>(fName);
 
    if (store)
    {
        if (!fieldExists)
        {
            const volVectorField& Uc = this->mesh().template
                lookupObject<volVectorField>(UName_);
 
            volVectorField* curlUcPtr =
                new volVectorField(fName, fvc::curl(Uc));
 
            curlUcPtr->store();
        }
 
        const volVectorField& curlUc = this->mesh().template
            lookupObject<volVectorField>(fName);
 
        curlUcInterpPtr_.reset
        (
            interpolation<vector>::New
            (
                this->owner().solution().interpolationSchemes(),
                curlUc
            ).ptr()
        );
    }
    else
    {
        curlUcInterpPtr_.clear();
 
        if (fieldExists)
        {
            volVectorField& curlUc =
                this->mesh().template lookupObjectRef<volVectorField>(fName);
 
            curlUc.checkOut();
        }
    }
}
 
 
template<class CloudType>
Foam::forceSuSp Foam::LiftForce<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
{
    forceSuSp value(Zero);
 
    vector curlUc =
        curlUcInterp().interpolate(p.coordinates(), p.currentTetIndices());
 
    scalar Cl = this->Cl(p, td, curlUc, Re, muc);
 
    value.Su() = mass/p.rho()*td.rhoc()*Cl*((td.Uc() - p.U())^curlUc);
 
    return value;
}
 
 
// ************************************************************************* //