Numerical simulation and mechanism analysis of freak waves

ZHANG Yunqiu; ZHANG Ningchuan; HU Jinpeng

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Article Navigation > Acta Oceanologica Sinica > 2007 > (5): 116-124

ZHANG Yunqiu, ZHANG Ningchuan, HU Jinpeng. Numerical simulation and mechanism analysis of freak waves[J]. Acta Oceanologica Sinica, 2007, (5): 116-124.

Citation:

ZHANG Yunqiu, ZHANG Ningchuan, HU Jinpeng. Numerical simulation and mechanism analysis of freak waves[J]. Acta Oceanologica Sinica, 2007, (5): 116-124.

ZHANG Yunqiu, ZHANG Ningchuan, HU Jinpeng. Numerical simulation and mechanism analysis of freak waves[J]. Acta Oceanologica Sinica, 2007, (5): 116-124.

Citation:

ZHANG Yunqiu, ZHANG Ningchuan, HU Jinpeng. Numerical simulation and mechanism analysis of freak waves[J]. Acta Oceanologica Sinica, 2007, (5): 116-124.

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Numerical simulation and mechanism analysis of freak waves

1.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
2.
College of Traffic and Communications, South China University of Technology, Guangzhou 510640, China

Received Date: 2006-12-12
Rev Recd Date: 2007-04-05

Abstract

Abstract

A numerical wave model based on the modified fourth-order nonlinear Schroe dinger equation (mNLSE) in deep water was developed to simulate the formation of freak waves and a standard split-step, pseudo-spectral method was used to solve the equation.The validation of the model is firstly verified, then the simulation of freak waves was performed by changing sideband conditions, and the variation of wave energy was also analyzed in the evolution.The results indicate that Benjamin-Feir instability (sideband instability) is an important mechanism for freak wave formation.
- freak waves,
- nonlinear Schroe dinger equation,
- pseudo-spectral method,
- sideband instability,
- numerical model