Mode coupling in nonlinear Kelvin-Helmholtz instability  

作　　者：王立锋 叶文华 李英骏 孟立民 

机构地区：[1]China University of Mining and Technology [2]Institute of Applied Physics and Computational Mathematics [3]Department of Physics, Zhejiang University

出　　处：《Chinese Physics B》2008年第10期3792-3798,共7页中国物理B（英文版）

基　　金：Project supported by the Research Fund for the Doctoral Program of Higher Education of China (Grant No 20070290008);the National Basic Research Program of China (Grant No 2007CB815100)

摘　　要：This paper investigates the interaction of a small number of modes in the two-fluid Kelvin-Helmholtz instability at the nonlinear regime by using a two-dimensional hydrodynamic code. This interaction is found to be relatively long range in wave-number space and also it acts in both directions, i.e. short wavelengths affect long wavelengths and vice versa. There is no simple equivalent transformation from a band of similar modes to one mode representing their effective amplitude. Three distinct stages of interaction have been identified.This paper investigates the interaction of a small number of modes in the two-fluid Kelvin-Helmholtz instability at the nonlinear regime by using a two-dimensional hydrodynamic code. This interaction is found to be relatively long range in wave-number space and also it acts in both directions, i.e. short wavelengths affect long wavelengths and vice versa. There is no simple equivalent transformation from a band of similar modes to one mode representing their effective amplitude. Three distinct stages of interaction have been identified.

关 键 词：Kelvin-Helmholtz instability mode coupling numerical simulation 

分 类 号：O35[理学—流体力学]