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Generation of internal and surface waves by seafloor movement in a two layer fluid system

文献类型：期刊论文

作者Song, Jin-Bao1,2
刊名THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS
出版日期2009-07-01
卷号23期号:3页码:197-211
关键词Two-layer Fluid Interfacial Waves Sea Floor Deformation Tsunami
ISSN号0935-4964
DOI10.1007/s00162-009-0119-4
文献子类Article
英文摘要Internal and surface waves generated by the deformations of the solid bed in a two layer fluid system of infinite lateral extent and uniform depth are investigated. An integral solution is developed for an arbitrary bed displacement on the basis of a linear approximation of the complete description of wave motion using a transform method (Laplace in time and Fourier in space) analogous to that used to study the generation of tsunamis by many researchers. The theoretical solutions are presented for three interesting specific deformations of the seafloor; the spatial variation of each seafloor displacement consists of a block section of the seafloor moving vertically either up or down while the time-displacement history of the block section is varied. The generation process and the profiles of the internal and surface waves for the case of the exponential bed movement are numerically illustrated, and the effects of the deformation parameters, densities and depths of the two layers on the solutions are discussed. As expected, the solutions derived from the present work include as special cases that obtained by Kervella et al. [Theor Comput Fluid Dyn 21:245-269, 2007] for tsunamis cased by an instantaneous seabed deformation and those presented by Hammack [J Fluid Mech 60:769-799, 1973] for the exponential and the half-sine bed displacements when the density of the upper fluid is taken as zero.; Internal and surface waves generated by the deformations of the solid bed in a two layer fluid system of infinite lateral extent and uniform depth are investigated. An integral solution is developed for an arbitrary bed displacement on the basis of a linear approximation of the complete description of wave motion using a transform method (Laplace in time and Fourier in space) analogous to that used to study the generation of tsunamis by many researchers. The theoretical solutions are presented for three interesting specific deformations of the seafloor; the spatial variation of each seafloor displacement consists of a block section of the seafloor moving vertically either up or down while the time-displacement history of the block section is varied. The generation process and the profiles of the internal and surface waves for the case of the exponential bed movement are numerically illustrated, and the effects of the deformation parameters, densities and depths of the two layers on the solutions are discussed. As expected, the solutions derived from the present work include as special cases that obtained by Kervella et al. [Theor Comput Fluid Dyn 21:245-269, 2007] for tsunamis cased by an instantaneous seabed deformation and those presented by Hammack [J Fluid Mech 60:769-799, 1973] for the exponential and the half-sine bed displacements when the density of the upper fluid is taken as zero.
学科主题Mechanics ; Physics, Fluids & Plasmas
URL标识查看原文
语种英语
WOS记录号WOS:000267593800002
公开日期2010-12-22
源URL[http://ir.qdio.ac.cn/handle/337002/2393]  
专题海洋研究所_海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, KLOCAW, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Song, Jin-Bao. Generation of internal and surface waves by seafloor movement in a two layer fluid system[J]. THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS,2009,23(3):197-211.
APA Song, Jin-Bao.(2009).Generation of internal and surface waves by seafloor movement in a two layer fluid system.THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS,23(3),197-211.
MLA Song, Jin-Bao."Generation of internal and surface waves by seafloor movement in a two layer fluid system".THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS 23.3(2009):197-211.

入库方式： OAI收割

来源：海洋研究所

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