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                    \\     ||  | 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 "SaffmanMei.H"
#include "fvcCurl.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace liftModels
{
    defineTypeNameAndDebug(SaffmanMei, 0);
    addToRunTimeSelectionTable(liftModel, SaffmanMei, dictionary);
}
}

using Foam::constant::mathematical::twoPi;

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

Foam::liftModels::SaffmanMei::SaffmanMei
(
    const dictionary& dict,
    const phaseInterface& interface
)
:
    dispersedLiftModel(dict, interface),
    residualRe_("residualRe", dimless, dict)
{}


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

Foam::liftModels::SaffmanMei::~SaffmanMei()
{}


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

Foam::tmp<Foam::volScalarField> Foam::liftModels::SaffmanMei::Cl() const
{
    const volScalarField Re(max(interface_.Re(), residualRe_));
    const volScalarField Rew
    (
        mag(fvc::curl(interface_.continuous().U()))
       *sqr(interface_.dispersed().d())
       /(
            interface_.continuous().fluidThermo().nu()
          + dimensionedScalar(dimKinematicViscosity, small)
        )
    );

    const volScalarField Cld
    (
        neg0(Re - 40)*6.46
       *(
           (1 - 0.3314*sqrt(0.5*(Rew/Re)))*exp(-0.1*Re)
         + 0.3314*sqrt(0.5*(Rew/Re))
        )
      + pos(Re - 40)*6.46*0.0524*sqrt(0.5*(Rew/Re)*Re)
    );

    return 3/(twoPi*sqrt(Rew + small))*Cld;
}


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