Publications

Zhang, HD., Cherneva, Z., Guedes Soares, C. and Onorato, M. (2014), “Modeling Extreme Wave Heights from Laboratory Experiments with the Nonlinear Schrödinger Equation”, Natural Hazards and Earth System Sciences, Vol. 14, pp. 959-968

Spatial variation of nonlinear wave groups with different initial envelope shapes is theoretically studied first, confirming that the simplest nonlinear theoretical model is capable of describing the evolution of propagating wave packet in deep water. Moreover, three groups of laboratory experiments run in the wave basin of CEHIPAR are systematically compared with the numerical simulations of nonlinear Schrödinger equation. Although a little overestimation is detected, especially in the set of experiments characterized by higher initial wave steepness, the numerical simulation still displays a high degree of agreement with the laboratory experiments. Therefore, the nonlinear Schrödinger equation catches the essential characteristics of the extreme waves and provides an important physical insight into their generation. The modulation instability, resulted by the quasi-resonant four wave interaction in a unidirectional sea state, can be indicated by the coefficient of kurtosis, which shows an appreciable correlation with the extreme wave height and hence is used in the modified Edgeworth-Rayleigh distribution. Finally, some statistical properties on the maximum wave heights in different sea states have been related with the initial Benjamin-Feir Index.

You can download this paper from: http://www.nat-hazards-earth-syst-sci.net/14/959/2014/nhess-14-959-2014.pdf

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