/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 1991-2008 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 2 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, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

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

#include "exponentialDiffusivity.H"
#include "surfaceFields.H"
#include "addToRunTimeSelectionTable.H"

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

namespace Foam
{
    defineTypeNameAndDebug(exponentialDiffusivity, 0);

    addToRunTimeSelectionTable
    (
        motionDiffusivity,
        exponentialDiffusivity,
        Istream
    );
}


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

Foam::exponentialDiffusivity::exponentialDiffusivity
(
    const fvMotionSolver& mSolver,
    Istream& mdData
)
:
    motionDiffusivity(mSolver),
    alpha_(readScalar(mdData)),
    basicDiffusivityPtr_(motionDiffusivity::New(mSolver, mdData))
{}


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

Foam::exponentialDiffusivity::~exponentialDiffusivity()
{}


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

Foam::tmp<Foam::surfaceScalarField>
Foam::exponentialDiffusivity::operator()() const
{
    return exp(-alpha_/basicDiffusivityPtr_->operator()());
}


void Foam::exponentialDiffusivity::correct()
{
    basicDiffusivityPtr_->correct();
}


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