/*---------------------------------------------------------------------------*\
  ==  == ====== ====   ====    |
                    \\     ||  | Multiphase Code Repository by HZDR
  ======   //   ||  || ===//   | Website: https://doi.org/10.14278/rodare.767
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-------------------------------------------------------------------------------
License
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    Website: https://hzdr.de

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#include "Tenneti.H"
#include "SchillerNaumann.H"
#include "addToRunTimeSelectionTable.H"

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

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


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

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


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

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


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

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

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

    const volScalarField Res(alpha2*interface_.Re());

    const volScalarField CdReIsolated
    (
        neg(Res - 1000)*24*(1 + 0.15*pow(Res, 0.687))
      + pos0(Res - 1000)*0.44*Res
    );

    const volScalarField F0
    (
        5.81*alpha1/pow3(alpha2) + 0.48*pow(alpha1, 1.0/3.0)/pow4(alpha2)
    );

    const volScalarField F1
    (
        pow3(alpha1)*Res*(0.95 + 0.61*pow3(alpha1)/sqr(alpha2))
    );

    // Tenneti et al. correlation includes the mean pressure drag.
    // This was removed here by multiplying F by alpha2 for consistency with
    // the formulation used in OpenFOAM
    return CdReIsolated + 24*sqr(alpha2)*(F0 + F1);
}


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