grad.H

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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
    (at your option) any later version.
 
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    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::functionObjects::grad
 
Description
    Calculates the gradient of a field.
 
    The operation is limited to scalar and vector volume or surface fields, and
    the output is a volume vector or tensor field.
 
See also
    Foam::functionObjects::fvMeshFunctionObject
 
SourceFiles
    grad.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef grad_functionObject_H
#define grad_functionObject_H
 
#include "fieldExpression.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace functionObjects
{
 
/*---------------------------------------------------------------------------*\
                            Class grad Declaration
\*---------------------------------------------------------------------------*/
 
class grad
:
    public fieldExpression
{
    // Private Member Functions
 
        //- Calculate the magnitude of the field and register the result
        template<class Type>
        bool calcGrad();
 
        //- Calculate the gradient field and return true if successful
        virtual bool calc();
 
 
public:
 
    //- Runtime type information
    TypeName("grad");
 
 
    // Constructors
 
        //- Construct from Time and dictionary
        grad
        (
            const word& name,
            const Time& runTime,
            const dictionary& dict
        );
 
 
    //- Destructor
    virtual ~grad();
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace functionObjects
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "gradTemplates.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //