foam-extend4.1-coherent-io/applications/solvers/multiphase/twoPhaseEulerFoam/kineticTheoryModels/viscosityModel/Syamlal/SyamlalViscosity.C

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.0
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
    This file is part of foam-extend.

    foam-extend 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.

    foam-extend is distributed in the hope that it will be useful, but
    WITHOUT 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
    along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "SyamlalViscosity.H"
#include "mathematicalConstants.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
namespace kineticTheoryModels
{
    defineTypeNameAndDebug(SyamlalViscosity, 0);
    addToRunTimeSelectionTable(viscosityModel, SyamlalViscosity, dictionary);
}
}


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

Foam::kineticTheoryModels::SyamlalViscosity::SyamlalViscosity
(
    const dictionary& dict
)
:
    viscosityModel(dict)
{}


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

Foam::kineticTheoryModels::SyamlalViscosity::~SyamlalViscosity()
{}


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

Foam::tmp<Foam::volScalarField> Foam::kineticTheoryModels::SyamlalViscosity::mua
(
    const volScalarField& alpha,
    const volScalarField& Theta,
    const volScalarField& g0,
    const dimensionedScalar& rhoa,
    const dimensionedScalar& da,
    const dimensionedScalar& e
) const
{
    const scalar sqrtPi = sqrt(mathematicalConstant::pi);

    return rhoa*da*sqrt(Theta)*
    (
        (4.0/5.0)*sqr(alpha)*g0*(1.0 + e)/sqrtPi
      + (1.0/15.0)*sqrtPi*g0*(1.0 + e)*(3.0*e - 1.0)*sqr(alpha)/(3.0 - e)
      + (1.0/6.0)*alpha*sqrtPi/(3.0 - e)
    );
}


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