/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  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/>.

Class
    Foam::displacementComponentLaplacianFvMotionSolver

Description
    Mesh motion solver for an fvMesh.  Based on solving the cell-centre
    Laplacian for the given component of the motion displacement.

SourceFiles
    displacementComponentLaplacianFvMotionSolver.C

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

#ifndef displacementComponentLaplacianFvMotionSolver_H
#define displacementComponentLaplacianFvMotionSolver_H

#include <fvMotionSolvers/fvMotionSolver.H>

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

namespace Foam
{

// Forward class declarations
class motionDiffusivity;

/*---------------------------------------------------------------------------*\
        Class displacementComponentLaplacianFvMotionSolver Declaration
\*---------------------------------------------------------------------------*/

class displacementComponentLaplacianFvMotionSolver
:
    public fvMotionSolver
{
    // Private data

        //- The component name to solve for
        word cmptName_;

        //- The component to solve for
        direction cmpt_;

        //- Reference point field for this component
        scalarField points0_;

        //- Point motion field
        mutable pointScalarField pointDisplacement_;

        //- Cell-centre motion field
        mutable volScalarField cellDisplacement_;

        //- Optionally read point-position field. Used only for position
        //  boundary conditions.
        mutable autoPtr<pointVectorField> pointLocation_;

        //- Diffusivity used to control the motion
        autoPtr<motionDiffusivity> diffusivityPtr_;

        //- Frozen points (that are not on patches). -1 or points that are
        //  fixed to be at points0_ location
        label frozenPointsZone_;


    // Private Member Functions

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

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

        //- Return the component corresponding to the given component name
        direction cmpt(const word& cmptName) const;


public:

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


    // Constructors

        //- Construct from polyMesh and data stream
        displacementComponentLaplacianFvMotionSolver
        (
            const polyMesh&,
            Istream& msData
        );


    // Destructor

        ~displacementComponentLaplacianFvMotionSolver();


    // Member Functions

        //- Return reference to the reference field
        const scalarField& points0() const
        {
            return points0_;
        }

        //- Non-const access to the cellDisplacement in order to allow
        //  changes to the boundary motion
        volScalarField& cellDisplacement()
        {
            return cellDisplacement_;
        }

        //- Return point location obtained from the current motion field
        virtual tmp<pointField> curPoints() const;

        //- Solve for motion
        virtual void solve();

        //- Update topology
        virtual void updateMesh(const mapPolyMesh&);
};


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

} // End namespace Foam

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

#endif

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