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ZHANG Yunqiu,ZHANG Ningchuan,HU Jinpeng. 2007. Numerical simulation and mechanism analysis of freak waves. Acta Oceanologica Sinica, (5):116－124
Numerical simulation and mechanism analysis of freak waves
Numerical simulation and mechanism analysis of freak waves
Received:December 12, 2006  Revised:April 05, 2007
DOI：
Key words:freak waves  nonlinear Schroe dinger equation  pseudo-spectral method  sideband instability  numerical model
中文关键词:  freak waves  nonlinear Schroe dinger equation  pseudo-spectral method  sideband instability  numerical model
基金项目:
Author NameAffiliationE-mail
ZHANG Yunqiu State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China zhyunqiu@student.dlut.edu.cn 
ZHANG Ningchuan State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China  
HU Jinpeng College of Traffic and Communications, South China University of Technology, Guangzhou 510640, China  
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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.
中文摘要:
      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.
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