limiterBlended.H

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2011 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::limiterBlended
 
Description
    Blends two specified schemes using the limiter function provided by a
    limitedSurfaceInterpolationScheme.
 
    The limited scheme is specified first followed by the scheme to be scaled
    by the limiter and then the scheme scaled by 1 - limiter e.g.
 
    div(phi,U)      Gauss limiterBlended vanLeer linear linearUpwind grad(U);
 
SourceFiles
    limiterBlended.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef limiterBlended_H
#define limiterBlended_H
 
#include "limitedSurfaceInterpolationScheme.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                           Class limiterBlended Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class limiterBlended
:
    public surfaceInterpolationScheme<Type>
{
    // Private Member Functions
 
        //- Limited scheme providing the limiter
        tmp<limitedSurfaceInterpolationScheme<Type> > tLimitedScheme_;
 
        //- Scheme 1
        tmp<surfaceInterpolationScheme<Type> > tScheme1_;
 
        //- Scheme 2
        tmp<surfaceInterpolationScheme<Type> > tScheme2_;
 
 
        //- Disallow default bitwise copy construct
        limiterBlended(const limiterBlended&);
 
        //- Disallow default bitwise assignment
        void operator=(const limiterBlended&);
 
 
public:
 
    //- Runtime type information
    TypeName("limiterBlended");
 
 
    // Constructors
 
        //- Construct from mesh and Istream.
        //  The name of the flux field is read from the Istream and looked-up
        //  from the mesh objectRegistry
        limiterBlended
        (
            const fvMesh& mesh,
            Istream& is
        )
        :
            surfaceInterpolationScheme<Type>(mesh),
            tLimitedScheme_
            (
                limitedSurfaceInterpolationScheme<Type>::New(mesh, is)
            ),
            tScheme1_
            (
                surfaceInterpolationScheme<Type>::New(mesh, is)
            ),
            tScheme2_
            (
                surfaceInterpolationScheme<Type>::New(mesh, is)
            )
        {}
 
        //- Construct from mesh, faceFlux and Istream
        limiterBlended
        (
            const fvMesh& mesh,
            const surfaceScalarField& faceFlux,
            Istream& is
        )
        :
            surfaceInterpolationScheme<Type>(mesh),
            tLimitedScheme_
            (
                limitedSurfaceInterpolationScheme<Type>::New(mesh, faceFlux, is)
            ),
            tScheme1_
            (
                surfaceInterpolationScheme<Type>::New(mesh, faceFlux, is)
            ),
            tScheme2_
            (
                surfaceInterpolationScheme<Type>::New(mesh, faceFlux, is)
            )
        {}
 
 
    // Member Functions
 
        //- Return the interpolation weighting factors
        tmp<surfaceScalarField> weights
        (
            const GeometricField<Type, fvPatchField, volMesh>& vf
        ) const
        {
            surfaceScalarField blendingFactor
            (
                tLimitedScheme_().limiter(vf)
            );
 
            return
                blendingFactor*tScheme1_().weights(vf)
              + (scalar(1) - blendingFactor)*tScheme2_().weights(vf);
        }
 
        //- Return the face-interpolate of the given cell field
        //  with explicit correction
        tmp<GeometricField<Type, fvsPatchField, surfaceMesh> >
        interpolate(const GeometricField<Type, fvPatchField, volMesh>& vf) const
        {
            surfaceScalarField blendingFactor
            (
                tLimitedScheme_().limiter(vf)
            );
 
            return
                blendingFactor*tScheme1_().interpolate(vf)
              + (scalar(1) - blendingFactor)*tScheme2_().interpolate(vf);
        }
 
 
        //- Return true if this scheme uses an explicit correction
        virtual bool corrected() const
        {
            return tScheme1_().corrected() || tScheme2_().corrected();
        }
 
 
        //- Return the explicit correction to the face-interpolate
        //  for the given field
        virtual tmp<GeometricField<Type, fvsPatchField, surfaceMesh> >
        correction
        (
            const GeometricField<Type, fvPatchField, volMesh>& vf
        ) const
        {
            surfaceScalarField blendingFactor
            (
                tLimitedScheme_().limiter(vf)
            );
 
            if (tScheme1_().corrected())
            {
                if (tScheme2_().corrected())
                {
                    return
                    (
                        blendingFactor
                      * tScheme1_().correction(vf)
                      + (scalar(1.0) - blendingFactor)
                      * tScheme2_().correction(vf)
                    );
                }
                else
                {
                    return
                    (
                        blendingFactor
                      * tScheme1_().correction(vf)
                    );
                }
            }
            else if (tScheme2_().corrected())
            {
                return
                (
                    (scalar(1.0) - blendingFactor)
                  * tScheme2_().correction(vf)
                );
            }
            else
            {
                return tmp<GeometricField<Type, fvsPatchField, surfaceMesh> >
                (
                    NULL
                );
            }
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //