AiryCoeffs.H

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License
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Class
    Foam::waveModels::AiryCoeffs
 
Description
    Calculation engine for the Airy wave model and other models that are a
    correction on top of the Airy model or a superposition of Airy models
 
SourceFiles
    AiryCoeffs.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef AiryCoeffs_H
#define AiryCoeffs_H
 
#include "waveModel.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace waveModels
{
 
/*---------------------------------------------------------------------------*\
                           Class AiryCoeffs Declaration
\*---------------------------------------------------------------------------*/
 
class AiryCoeffs
{
private:
 
    // Private Static Member Functions
 
        //- Calculate the length from the depth, amplitude, period and g.
        //  Requires a function which returns celerity given the depth,
        //  amplitude, length and g. Iterates to solve this function for the
        //  specified period.
        static scalar calcLength
        (
            const scalar depth,
            const scalar amplitude,
            const scalar period,
            const scalar g,
            scalar (*celerityPtr)(const AiryCoeffs&)
        );
 
 
public:
 
    // Public Data
 
        //- Depth [m]
        const scalar depth;
 
        //- Amplitude [m]
        const scalar amplitude;
 
        //- Wavelength [m]
        const scalar length;
 
        //- Gravitational acceleration [m/s^2]
        const scalar g;
 
 
    // Constructors
 
        //- Construct from components
        AiryCoeffs
        (
            const scalar depth,
            const scalar amplitude,
            const scalar length,
            const scalar g
        );
 
        //- Construct from components but with period instead of length
        AiryCoeffs
        (
            const scalar depth,
            const scalar amplitude,
            const scalar period,
            const scalar g,
            scalar (*celerityPtr)(const AiryCoeffs&)
        );
 
 
    // Member Functions
 
        //- The angular wavenumber [rad/m]
        scalar k() const;
 
        //- Return whether shallow and intermediate effects are to be omitted
        bool deep() const;
 
        //- The wave celerity [m/s]
        static scalar celerity(const AiryCoeffs& coeffs);
 
        //- The wave celerity [m/s]
        scalar celerity() const;
 
        //- Angle of the oscillation [rad]
        tmp<scalarField> angle
        (
            const scalar phase,
            const scalar t,
            const scalarField& x
        ) const;
 
        //- Get the wave elevation at a given time and local coordinates. Local
        //  x is aligned with the direction of propagation.
        tmp<scalarField> elevation
        (
            const scalar phase,
            const scalar t,
            const scalarField& x
        ) const;
 
        //- Return the non-dimensionalised i-th harmonic of the velocity
        tmp<vector2DField> vi
        (
            const label i,
            const scalar phase,
            const scalar t,
            const vector2DField& xz
        ) 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.
        tmp<vector2DField> velocity
        (
            const scalar phase,
            const scalar t,
            const vector2DField& xz
        ) const;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace waveModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //