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

doi:10.1007/s00162-009-0119-4

IOCAS-IR > 海洋环流与波动重点实验室

	Generation of internal and surface waves by seafloor movement in a two layer fluid system
	Song, Jin-Bao 1,2
	2009-07-01
发表期刊	THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS
ISSN	0935-4964
卷号	23 期号:3 页码:197-211
文章类型	Article
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.
关键词	Two-layer Fluid Interfacial Waves Sea Floor Deformation Tsunami
学科领域	Mechanics ; Physics, Fluids & Plasmas
DOI	10.1007/s00162-009-0119-4
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000267593800002
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2392
专题	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
第一作者单位	中国科学院海洋研究所; 海洋环流与波动重点实验室
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.

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