/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | Multiphase Code Repository by HZDR
  ======   //   ||  || ===//   | Website: https://doi.org/10.14278/rodare.767
  ||  ||  //    ||  // || \\   | License: GPL-3.0-or-later
  ==  == ====== ====   ==  ==  |
-------------------------------------------------------------------------------
License
    This file is part of the Multiphase Code Repository by HZDR.

    Copyright (C) 2025 by Helmholtz-Zentrum Dresden-Rossendorf e.V. (HZDR),
    Website: https://hzdr.de

    Multiphase Code Repository by HZDR is based on the free software for
    computational fluid dynamics (CFD) from the OpenFOAM Foundation.
    Copyright (C) 2025 by OpenFOAM Foundation, Website: https://openfoam.org

    If you are interested in which files are original OpenFOAM Foundation
    files, which OpenFOAM Foundation files were modified, and which files were
    newly created, see FILES.md.

    Multiphase Code Repository by HZDR is free software: you can redistribute
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\*---------------------------------------------------------------------------*/

#include "Beetstra.H"
#include "addToRunTimeSelectionTable.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
namespace dragModels
{
    defineTypeNameAndDebug(Beetstra, 0);
    addToRunTimeSelectionTable(dragModel, Beetstra, dictionary);
}
}


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

Foam::dragModels::Beetstra::Beetstra
(
    const dictionary& dict,
    const phaseInterface& interface,
    const bool registerObject
)
:
    dispersedDragModel(dict, interface, registerObject)
{}


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

Foam::dragModels::Beetstra::~Beetstra()
{}


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

Foam::tmp<Foam::volScalarField> Foam::dragModels::Beetstra::CdRe() const
{
    const volScalarField alpha1
    (
        max(interface_.dispersed(), interface_.dispersed().residualAlpha())
    );

    const volScalarField alpha2
    (
        max(interface_.continuous(), interface_.continuous().residualAlpha())
    );

    const volScalarField Res(max(alpha2*interface_.Re(), scalar(0)));

    const volScalarField F0
    (
        "F0",
        10*alpha1/sqr(alpha2) + sqr(alpha2)*(1 + 1.5*sqrt(alpha1))
    );

    const volScalarField F1
    (
        "F1",
        0.413*Res/(24*sqr(alpha2))*(1.0/alpha2
        + 3*alpha1*alpha2 + 8.4*pow(Res, -0.343))
        /(1 + pow(10.0, 3*alpha1)*pow(Res, -(1 + 4*alpha1)/2.0))
    );

    return 24*alpha2*(F0 + F1);
}


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