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| 连续层化流体中内波破碎的动力学机制的数值研究 | |
| 引用本文： | 刘国涛,尚晓东,陈桂英,杨棋,刘良钢,程晓波.连续层化流体中内波破碎的动力学机制的数值研究[J].热带海洋学报,2009,28(1). |
| 作者姓名： | 刘国涛 尚晓东 陈桂英 杨棋 刘良钢 程晓波 |
| 作者单位： | 1. 中国科学院南海海洋研究所热带海洋环境动力学重点实验室,广东,广州,510301;中海石油(中国)有限公司深圳分公司,广东,广州,510240 2. 中国科学院南海海洋研究所热带海洋环境动力学重点实验室,广东,广州,510301 3. 澳门科技大学资讯科技学院,澳门 4. 中山大学理工学院,广东,广州,510275 |
| 基金项目： | 中国科学院领域前沿项目，王宽诚博士后工作奖励基金;国家自然科学基金，国家科技支撑项目 |
| 摘 要： | 对单频内波在白噪声的干扰下引起的不稳定现象进行了数值研究,分析了不同振幅和不同Pr数(Prandtl number)对静力不稳定、剪切不稳定、对流不稳定出现的时间、地点及持续时间的影响.结果显示,静力不稳定总是比其它2种不稳定先出现,其持续时间也是最长的;振幅越大(Pr＝0.72)时,内波越不稳定,导致3种不稳定出现的时间明显提前;Pr数增大(A＝0.256)时,3种不稳定出现的时间也略有提前. |
| 关 键 词： | 不稳定 内波 连续层化流体 谱方法 |
A numerical study of dynamical mechanism of induced internal waves breaking in continual stratified fluids |
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| LIU Guo-tao,SHANG Xiao-dong,CHEN Gui-ying,YANG Qi,LIU Liang-gang,CHENG Xiao-bo.A numerical study of dynamical mechanism of induced internal waves breaking in continual stratified fluids[J].Journal of Tropical Oceanography,2009,28(1). | |
| Authors: | LIU Guo-tao SHANG Xiao-dong CHEN Gui-ying YANG Qi LIU Liang-gang CHENG Xiao-bo |
| Institution: | 1.Key Laboratory of Tropical Marine Environmental Dynamics;South China Sea Institute of Oceanology;CAS;Guangzhou 510301;China;2.Shenzhen Branch of CNOOC Ltd.;Guangzhou 510240;3.Faculty of Information Technology;Macau University of Science and Technology;Macau;4.Department of Physics and Engineering;Sun Yat-sen University;Guangzhou 510275;China |
| Abstract: | The instabilities of monochromatic internal waves disturbed by white noise at initial encounter are studied through numerical experiments,and the influence of amplitude(A) and Prandtl number(Pr) on generation time,location and duration of these instabilities are analyzed.The results show that the static instability emerges firstly before the shear instability and convective instability,and that the static instability lasts longer than the other two types of instabilities.For Pr=0.72,as the amplitude increas... |
| Keywords: | instability internal wave continual stratified fluid spectral method |
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