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Focusing of nonlinear wave groups in deep water

  • Nonlinear Dynamics
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Abstract

The freak wave phenomenon in the ocean is explained by the nonlinear dynamics of phase-modulated wave trains. It is shown that the preliminary quadratic phase modulation of wave packets leads to a significant amplification of the usual modulation (Benjamin-Feir) instability. Physically, the phase modulation of water waves may be due to a variable wind in storm areas. The well-known breather solutions of the cubic Schrödinger equation appear on the final stage of the nonlinear dynamics of wave packets when the phase modulation becomes more uniform.

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From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 4, 2001, pp. 190–195.

Original English Text Copyright © 2001 by Kharif, Pelinovsky, Talipova, Slunyaev.

This article was submitted by the authors in English.

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Kharif, C., Pelinovsky, E., Talipova, T. et al. Focusing of nonlinear wave groups in deep water. Jetp Lett. 73, 170–175 (2001). https://doi.org/10.1134/1.1368708

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  • DOI: https://doi.org/10.1134/1.1368708

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