pressureGradientExplicitSource.H

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/*---------------------------------------------------------------------------*\
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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
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Class
    Foam::pressureGradientExplicitSource

Description
    Creates a cell set pressure gradient source

    Note: Currently only handles kinematic pressure

SourceFiles
    pressureGradientExplicitSource.C

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

#ifndef pressureGradientExplicitSource_H
#define pressureGradientExplicitSource_H

#include <OpenFOAM/autoPtr.H>
#include <meshTools/topoSetSource.H>
#include <meshTools/cellSet.H>
#include <finiteVolume/fvMesh.H>
#include <finiteVolume/volFields.H>

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

namespace Foam
{

/*---------------------------------------------------------------------------*\
              Class pressureGradientExplicitSource Declaration
\*---------------------------------------------------------------------------*/

class pressureGradientExplicitSource
{
    // Private data

        //- Name of the source
        const word sourceName_;

        //- Reference to the mesh
        const fvMesh& mesh_;

        //- Reference to the velocity field
        volVectorField& U_;

        //- Properties dictionary
        IOdictionary dict_;

        //- Average velocity
        vector Ubar_;

        //- Initial pressure gradient
        dimensionedScalar gradPini_;

        //- Pressure gradient
        dimensionedScalar gradP_;

        //- Flow direction
        vector flowDir_;

        //- Name of cell source
        word cellSource_;

        //- The method by which the cells will be selecetd
        autoPtr<topoSetSource> cellSelector_;

        //- The set of selected cells
        cellSet selectedCellSet_;


    // Private Member Functions

        //- Write the pressure gradient to file (for restarts etc)
        void writeGradP() const;

        //- Disallow default bitwise copy construct
        pressureGradientExplicitSource(const pressureGradientExplicitSource&);

        //- Disallow default bitwise assignment
        void operator=(const pressureGradientExplicitSource&);


public:

    // Constructors

        //- Construct from explicit source name and mesh
        pressureGradientExplicitSource
        (
            const word& sourceName,
            volVectorField& U
        );


    // Member Functions

        // Access

            //- Return a tmp field of the source
            tmp<DimensionedField<vector, volMesh> > Su() const;


        //- Correct driving force for a constant mass flow rate
        void update();
};


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

} // End namespace Foam

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

#endif

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