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Indexed by:会议论文

Date of Publication:2009-10-13

Included Journals:EI、CPCI-S、Scopus

Volume:116

Issue:1

Page Number:366-372

Key Words:Freak waves; nonlinear Schrodinger equation; Benjamin-Feir instability; JONSWAP spectrum

Abstract:The generation of freak waves in a 2-dimensional random sea state characterized by the JONSWAP spectrum are simulated employing a nonlinear fourth-order Schrodinger equation. The evolution of the freak waves in deep water are analyzed. We investigate the effect of initial wave parameters on kurtosis and occurrence of freak waves. The results show that Benjamin-Feir index (BFI) is an important parameter to identify the presence of instability. The kurtosis presents a similar spatial evolution trend with the occurrence probability of freak waves. Freak waves in a random sea state are more likely to occur for narrow spectrum and small values of significant wave height. (C) 2015 Published by Elsevier Ltd.