Mathematical Proceedings of the Cambridge Philosophical Society · 1950 · 191 citations · 2 references
Natural SciencesMathematicsOcean EngineeringOcean ModelingOcean WavesPhysical OceanographyMarine HydrodynamicsSurface Wave DynamicsSurface Wave MethodsWave GenerationDeep Water WavesFree-surface WavesSurface WavesVelocityVelocity DistributionWave HydrodynamicsWave ModelWave Theory
The study presents a method to compute small‑amplitude surface waves in deep water generated by a prescribed normal velocity distribution on a submerged circular cylinder. The method solves an infinite linear system for the wave amplitudes, using convergent power‑series expansions in Ka for small Ka and infinite determinants for larger Ka, and also examines cylinder pulsations under uniform normal velocity. It is shown that the reflection coefficient for waves incident on a fixed circular cylinder is zero, confirming Dean’s earlier result.
ABSTRACT A method is given for the calculation of the surface waves of small amplitude generated on deep water by a normal velocity distribution of period 2π/σ prescribed over a submerged circular cylinder. The method of solution involves a system of linear equations in an infinite number of unknowns; this system always possesses a solution. The unknowns may be obtained as power series in a parameter Ka , convergent for sufficiently small values of the parameter. When the parameter is not small, the equations can be solved by infinite determinants. It is shown that the reflexion coefficient of waves incident on a fixed circular cylinder vanishes, as was first shown by Dean. The pulsations of a submerged cylinder are discussed when the normal velocity is the same at all points of the cylinder at any given time.
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