/*---------------------------------------------------------------------------*\
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    Copyright (C) 2017-2018 OpenFOAM Foundation
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License
    This file is part of OpenFOAM.

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    under the terms of the GNU General Public License as published by
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Class
    Foam::diameterModels::driftModels::constantDrift

Description
    Constant drift rate within all classes. Used for verification and
    validation of the drift formulation implemented in the
    populationBalanceModel class. Rate is calculated from fvOptions mass source.


SourceFiles
    constant.C

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

#ifndef constantDrift_H
#define constantDrift_H

#include "driftModel.H"

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

namespace Foam
{
namespace diameterModels
{
namespace driftModels
{

/*---------------------------------------------------------------------------*\
                        Class constantDrift Declaration
\*---------------------------------------------------------------------------*/

class constantDrift
:
    public driftModel
{
    // Private data

        //- Total number concentration
        volScalarField N_;


public:

    //- Runtime type information
    TypeName("constant");

    // Constructor

        constantDrift
        (
            const populationBalanceModel& popBal,
            const dictionary& dict
        );


    //- Destructor
    virtual ~constantDrift() = default;


    // Member Functions

        //- Correct diameter independent expressions
        virtual void correct();

        //- Add to driftRate
        virtual void addToDriftRate
        (
            volScalarField& driftRate,
            const label i
        );
};


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

} // End namespace driftModels
} // End namespace diameterModels
} // End namespace Foam

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

#endif

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