INTERACTION DYNAMICS OF SOLITARY WAVES ON A FALLING FILM

被引:66
作者
CHANG, HC [1 ]
DEMEKHIN, E [1 ]
KALAIDIN, E [1 ]
机构
[1] KUBAN STATE TECHNOL UNIV,DEPT MATH APPL,KRASNODAR 3500072,RUSSIA
关键词
D O I
10.1017/S0022112095002837
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Beyond a short transition region near the inlet, waves on a falling him evolve into distinct pulse-like solitary waves that dominate all subsequent interfacial dynamics. Numerical and physical experiments indicate that these localized structures can attract and repel each other. Attractive interaction through the capillary ripples of the pulses causes two pulses to coalesce into a bigger pulse which accelerates and precipitates further coalescence. This binary interaction between an 'excited' pulse after coalescence and its smaller front neighbour is the key mechanism that drives the observed wave dynamics. From symmetry arguments, two dominant modes for a solitary pulse are obtained and used to develop an inelastic coherent structure theory for binary interaction between an excited pulse and its front neighbour, The theory offers a simple dynamical system that quantitatively describes the binary interaction and promises to elucidate the complex wave dynamics on a falling him.
引用
收藏
页码:123 / 154
页数:32
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