grad.H

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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 functionObjects_grad_H
#define functionObjects_grad_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

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