Advances in Breaking-Wave Dynamics
Progress has been made recently not only in numerical methods of calculating steep waves but also in finding analytic solutions for overturning fluid motions. Thus, the tip of the wave can take the form of a slender hyperbola, in which the orientation of the axes and the angle between the asymptotes are both functions of the time. The initial stages of overturning are given approximately by a two-term expression for the potential, with a branch-point located in the “tube” of the wave. Most remarkably, plunging breakers appear experimentally to tend toward certain exact, time-dependent flows (recently discovered) in which the forward face is given by a simple parametric cubic curve. Dynamical aspects breaking waves are discussed, particularly in terms of angular momentum.
KeywordsAngular Momentum Free Surface Gravity Wave Breaking Wave Surf Zone
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