…
►Two-dimensional periodic waves in a shallow waterwave tank.
Taken from Joe Hammack, Daryl McCallister, Norman Scheffner and Harvey Segur, “Two-dimensional periodic waves in shallow water.
…The caption reads “Mosaic of two overhead photographs, showing surface patterns of waves in shallow water”.
…
►Applications of Struve functions occur in water-wave and surface-wave problems (Hirata (1975) and Ahmadi and Widnall (1985)), unsteady aerodynamics (Shaw (1985) and Wehausen and Laitone (1960)), distribution of fluid pressure over a vibrating disk (McLachlan (1934)), resistive MHD instability theory (Paris and Sy (1983)), and optical diffraction (Levine and Schwinger (1948)).
…
…
►Particularly important for the use of Riemann theta functions is the Kadomtsev–Petviashvili (KP) equation, which describes the propagation of two-dimensional, long-wave length surface waves in shallow water (Ablowitz and Segur (1981, Chapter 4)):
…
►►►Figure 21.9.1: Two-dimensional periodic waves in a shallow waterwave tank, taken from Hammack et al. (1995, p. 97) by permission of Cambridge University Press.
The original caption reads “Mosaic of two overhead photographs, showing surface patterns of waves in shallow water.
…
Magnify►►►Figure 21.9.2: Contour plot of a two-phase solution of Equation (21.9.3).
…
Magnify
…
►A ship moving with constant speed on deep water generates a surface gravity wave.
…
►For further information see Lord Kelvin (1891, 1905) and Ursell (1960, 1994).
…
►These first appeared in connection with the equation governing the evolution of long shallow waterwaves of permanent form, generally called solitons, and are predicted by the Korteweg–de Vries (KdV) equation (a third-order nonlinear partial differential equation).
…
…
►Such solutions include standing or stationary waves, periodic cnoidal waves, and single and multi-solitons occurring in diverse physical situations such as waterwaves, optical pulses, quantum fluids, and electrical impulses (Hasegawa (1989), Carr et al. (2000), Kivshar and Luther-Davies (1998), and Boyd (1998, Appendix D2.2)).
…