| Numerical simulation and mechanism analysis of freak waves |
| |
| 作者姓名： | ZHANG Yunqiu ZHANG Ningchuan HU Jinpeng |
| |
| 作者单位： | ZHANG Yunqiu1，ZHANG Ningchuan1，HU Jinpeng21.State Key Laboratory of Coastal and Offshore Engineering，Dalian University of Technology，Dalian 116024，China2.College of Traffic and Communications，South China University of Technology，Guangzhou 510640，China |
| |
| 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.
|
| 关 键 词： | 非线性模拟技术 边带 不稳定性 数字模型 |
| 收稿时间： | 2006/12/12 0:00:00 |
| 修稿时间： | 2006-12-12 |
Numerical simulation and mechanism analysis of freak waves |
| |
| ZHANG Yunqiu,ZHANG Ningchuan,HU Jinpeng.Numerical simulation and mechanism analysis of freak waves[J].Acta Oceanologica Sinica,2007,26(5):116-124. |
| |
| Authors: | ZHANG Yunqiu ZHANG Ningchuan and HU Jinpeng |
| |
| Institution: | 1.State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China2.College of Traffic and Communications, South China University of Technology, Guangzhou 510640, China |
| |
| 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. |
| |
| Keywords: | freak waves nonlinear Schroe dinger equation pseudo-spectral method sideband instability numerical model |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
