Stokes2.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::waveModels::Stokes2
 
Description
    Second-order wave model.
 
    Reference:
    \verbatim
        Stokes, G.G. (1847)
        On the theory of oscillatory waves.
        Transactions of the Cambridge Philosophical Society, 8, 441.
    \endverbatim
 
    See equations 18 and 19.
 
SourceFiles
    Stokes2.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Stokes2_H
#define Stokes2_H
 
#include "Airy.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace waveModels
{
 
/*---------------------------------------------------------------------------*\
                           Class Stokes2 Declaration
\*---------------------------------------------------------------------------*/
 
class Stokes2
:
    public Airy
{
protected:
 
    // Protected Member Functions
 
        //- The wave celerity [m/s]
        static scalar celerity
        (
            const scalar depth,
            const scalar amplitude,
            const scalar length,
            const scalar g
        );
 
        //- The wave celerity [m/s]
        virtual scalar celerity() const
        {
            return celerity(depth(), amplitude(), length(), g());
        }
 
 
public:
 
   //- Runtime type information
    TypeName("Stokes2");
 
 
    // Constructors
 
        //- Construct from a dictionary and gravity
        Stokes2
        (
            const dictionary& dict,
            const scalar g,
            const word& modelName = Stokes2::typeName,
            scalar (*modelCelerity)(scalar, scalar, scalar, scalar) =
                &Stokes2::celerity
        );
 
        //- Construct a clone
        virtual autoPtr<waveModel> clone() const
        {
            return autoPtr<waveModel>(new Stokes2(*this));
        }
 
 
    //- Destructor
    virtual ~Stokes2();
 
 
    // Member Functions
 
        //- Get the wave elevation at a given time and local coordinates. Local
        //  x is aligned with the direction of propagation.
        virtual tmp<scalarField> elevation
        (
            const scalar t,
            const scalarField& x
        ) const;
 
        //- Get the wave velocity at a given time and local coordinates. Local
        //  x is aligned with the direction of propagation, and z with negative
        //  gravity.
        virtual tmp<vector2DField> velocity
        (
            const scalar t,
            const vector2DField& xz
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
} // End namespace waveModels
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //