Moment.H

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2013-2014 OpenFOAM Foundation
     \\/     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::AveragingMethods::Moment
 
Description
    Moment lagrangian averaging procedure.
 
    Point values and moments from the cell centroid are summed over
    computational cells. A linear function is generated which has the same
    integrated moment as that of the point data.
 
    The computed linear function is used to interpolate values within a cell.
    The gradient is calculated from the coefficients of the function, and is
    assumed constant over the cell.
 
SourceFiles
    Moment.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Moment_H
#define Moment_H
 
#include "AveragingMethod.H"
#include "pointMesh.H"
#include "tetIndices.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace AveragingMethods
{
 
/*---------------------------------------------------------------------------*\
                           Class Moment Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class Moment
:
    public AveragingMethod<Type>
{
public:
 
    //- Public typedefs
 
        //- Gradient type
        typedef typename AveragingMethod<Type>::TypeGrad TypeGrad;
 
 
private:
 
    //- Private data
 
        //- Data mean
        Field<Type>& data_;
 
        //- X-data moment
        Field<Type>& dataX_;
 
        //- Y-data moment
        Field<Type>& dataY_;
 
        //- Z-data moment
        Field<Type>& dataZ_;
 
        //- Transform tensor from moment to gradient
        Field<symmTensor> transform_;
 
        //- Length scale for moment values
        Field<scalar> scale_;
 
 
    //- Private member functions
 
        //- Re-calculate gradient
        virtual void updateGrad();
 
 
public:
 
    //- Runtime type information
    TypeName("moment");
 
 
    //- Constructors
 
        //- Construct from components
        Moment
        (
            const IOobject& io,
            const dictionary& dict,
            const fvMesh &mesh
        );
 
        //- Construct a copy
        Moment(const Moment<Type>& am);
 
        //- Construct and return a clone
        virtual autoPtr<AveragingMethod<Type> > clone() const
        {
            return autoPtr<AveragingMethod<Type> >
            (
                new Moment<Type>(*this)
            );
        }
 
 
    //- Destructor
    virtual ~Moment();
 
 
    //- Member Functions
 
        //- Add point value to interpolation
        void add
        (
            const point position,
            const tetIndices& tetIs,
            const Type& value
        );
 
        //- Interpolate
        Type interpolate
        (
            const point position,
            const tetIndices& tetIs
        ) const;
 
        //- Interpolate gradient
        TypeGrad interpolateGrad
        (
            const point position,
            const tetIndices& tetIs
        ) const;
 
        //- Return an internal field of the average
        tmp<Field<Type> > internalField() const;
 
        //- Return an internal field of the gradient
        tmp<Field<TypeGrad> > internalFieldGrad() const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace AveragingMethods
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
#   include "Moment.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //