/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2010 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
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.

    OpenFOAM 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 OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.

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

#include "smoluchowskiJumpTFvPatchScalarField.H"
#include <OpenFOAM/addToRunTimeSelectionTable.H>
#include <finiteVolume/fvPatchFieldMapper.H>
#include <finiteVolume/volFields.H>
#include <OpenFOAM/mathematicalConstants.H>

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

namespace Foam
{

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

smoluchowskiJumpTFvPatchScalarField::smoluchowskiJumpTFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mixedFvPatchScalarField(p, iF),
    accommodationCoeff_(1.0),
    Twall_(p.size(), 0.0),
    gamma_(1.4)
{
    refValue() = 0.0;
    refGrad() = 0.0;
    valueFraction() = 0.0;
}

smoluchowskiJumpTFvPatchScalarField::smoluchowskiJumpTFvPatchScalarField
(
    const smoluchowskiJumpTFvPatchScalarField& ptf,
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    mixedFvPatchScalarField(ptf, p, iF, mapper),
    accommodationCoeff_(ptf.accommodationCoeff_),
    Twall_(ptf.Twall_),
    gamma_(ptf.gamma_)
{}


smoluchowskiJumpTFvPatchScalarField::smoluchowskiJumpTFvPatchScalarField
(
    const fvPatch& p,
    const DimensionedField<scalar, volMesh>& iF,
    const dictionary& dict
)
:
    mixedFvPatchScalarField(p, iF),
    accommodationCoeff_(readScalar(dict.lookup("accommodationCoeff"))),
    Twall_("Twall", dict, p.size()),
    gamma_(dict.lookupOrDefault<scalar>("gamma", 1.4))
{
    if
    (
        mag(accommodationCoeff_) < SMALL
     || mag(accommodationCoeff_) > 2.0
    )
    {
        FatalIOErrorIn
        (
            "smoluchowskiJumpTFvPatchScalarField::"
            "smoluchowskiJumpTFvPatchScalarField"
            "("
            "    const fvPatch&,"
            "    const DimensionedField<scalar, volMesh>&,"
            "    const dictionary&"
            ")",
            dict
        )   << "unphysical accommodationCoeff specified"
            << "(0 < accommodationCoeff <= 1)" << endl
            << exit(FatalError);
    }

    if (dict.found("value"))
    {
        fvPatchField<scalar>::operator=
        (
            scalarField("value", dict, p.size())
        );
    }
    else
    {
        fvPatchField<scalar>::operator=(patchInternalField());
    }

    refValue() = *this;
    refGrad() = 0.0;
    valueFraction() = 0.0;
}


smoluchowskiJumpTFvPatchScalarField::smoluchowskiJumpTFvPatchScalarField
(
    const smoluchowskiJumpTFvPatchScalarField& ptpsf,
    const DimensionedField<scalar, volMesh>& iF
)
:
    mixedFvPatchScalarField(ptpsf, iF),
    accommodationCoeff_(ptpsf.accommodationCoeff_),
    Twall_(ptpsf.Twall_),
    gamma_(ptpsf.gamma_)
{}


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

// Map from self
void smoluchowskiJumpTFvPatchScalarField::autoMap
(
    const fvPatchFieldMapper& m
)
{
    mixedFvPatchScalarField::autoMap(m);
}


// Reverse-map the given fvPatchField onto this fvPatchField
void smoluchowskiJumpTFvPatchScalarField::rmap
(
    const fvPatchField<scalar>& ptf,
    const labelList& addr
)
{
    mixedFvPatchField<scalar>::rmap(ptf, addr);
}


// Update the coefficients associated with the patch field
void smoluchowskiJumpTFvPatchScalarField::updateCoeffs()
{
    if (updated())
    {
        return;
    }

    const fvPatchScalarField& pmu =
        patch().lookupPatchField<volScalarField, scalar>("mu");
    const fvPatchScalarField& prho =
        patch().lookupPatchField<volScalarField, scalar>("rho");
    const fvPatchField<scalar>& ppsi =
        patch().lookupPatchField<volScalarField, scalar>("psi");
    const fvPatchVectorField& pU =
        patch().lookupPatchField<volVectorField, vector>("U");

    // Prandtl number reading consistent with rhoCentralFoam
    const dictionary& thermophysicalProperties =
        db().lookupObject<IOdictionary>("thermophysicalProperties");
    dimensionedScalar Pr = dimensionedScalar("Pr", dimless, 1.0);
    if (thermophysicalProperties.found("Pr"))
    {
        Pr = thermophysicalProperties.lookup("Pr");
    }

    Field<scalar> C2 = pmu/prho
        *sqrt(ppsi*mathematicalConstant::pi/2.0)
        *2.0*gamma_/Pr.value()/(gamma_ + 1.0)
        *(2.0 - accommodationCoeff_)/accommodationCoeff_;

    Field<scalar> aCoeff = prho.snGrad() - prho/C2;
    Field<scalar> KEbyRho = 0.5*magSqr(pU);

    valueFraction() = (1.0/(1.0 + patch().deltaCoeffs()*C2));
    refValue() = Twall_;
    refGrad() = 0.0;

    mixedFvPatchScalarField::updateCoeffs();
}


// Write
void smoluchowskiJumpTFvPatchScalarField::write(Ostream& os) const
{
    fvPatchScalarField::write(os);
    os.writeKeyword("accommodationCoeff")
        << accommodationCoeff_ << token::END_STATEMENT << nl;
    Twall_.writeEntry("Twall", os);
    os.writeKeyword("gamma")
        << gamma_ << token::END_STATEMENT << nl;
    writeEntry("value", os);
}


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

makePatchTypeField(fvPatchScalarField, smoluchowskiJumpTFvPatchScalarField);

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

} // End namespace Foam

// ************************ vim: set sw=4 sts=4 et: ************************ //
