fourthGrad.H

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | www.openfoam.com
     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2011-2016 OpenFOAM Foundation
    Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
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::fv::fourthGrad
 
Group
    grpFvGradSchemes
 
Description
    Second-order gradient scheme using least-squares.
 
SourceFiles
    fourthGrad.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef fourthGrad_H
#define fourthGrad_H
 
#include "gradScheme.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace fv
{
 
/*---------------------------------------------------------------------------*\
                      Class fourthGrad Declaration
\*---------------------------------------------------------------------------*/
 
template<class Type>
class fourthGrad
:
    public fv::gradScheme<Type>
{
    // Private Member Functions
 
        //- No copy construct
        fourthGrad(const fourthGrad&) = delete;
 
        //- No copy assignment
        void operator=(const fourthGrad&) = delete;
 
 
public:
 
    //- Runtime type information
    TypeName("fourth");
 
 
    // Constructors
 
        //- Construct from Istream
        fourthGrad(const fvMesh& mesh, Istream&)
        :
            gradScheme<Type>(mesh)
        {}
 
 
    // Member Functions
 
        //- Return the gradient of the given field to the gradScheme::grad
        //- for optional caching
        virtual tmp
        <
            GeometricField
            <typename outerProduct<vector, Type>::type, fvPatchField, volMesh>
        > calcGrad
        (
            const GeometricField<Type, fvPatchField, volMesh>& vsf,
            const word& name
        ) const;
 
        //- Calculate the grad of the given field into supplied field
        virtual void calcGrad
        (
            GeometricField
            <typename outerProduct<vector, Type>::type, fvPatchField, volMesh>& res,
            const GeometricField<Type, fvPatchField, volMesh>&
        ) const;
 
        //- Helper : calculate the grad of the given field into supplied field
        void calcGrad
        (
            GeometricField
            <
                typename outerProduct<vector, Type>::type,
                fvPatchField,
                volMesh
            >& fGrad,
            const GeometricField<Type, fvPatchField, volMesh>& vsf,
            const GeometricField
            <
                typename outerProduct<vector, Type>::type,
                fvPatchField,
                volMesh
            >& secondfGrad
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fv
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "fourthGrad.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //