A Chaotic Stirring by an Oscillating Point Vortex

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概要

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• Aref's blinking vortex system (H. Aref: J. Fluid Mech. 143 (1984) 1.) is extended tothe case when the vortex oscillates harmonically. The equations of motion of thepassive particle are given in coordinates suitable for integration. Stirring mechanismcould be described by the horse-shoe map in the rotational way not in the linear way.The optimal operating condition for the best stirring exists for the parameter p (pro-portional to the vortex strength, the period of the vortex motion and the inverse ofthe tank area). Merging and splitting between the chaotic regions takes place abruptlynear the boundary when the parameters are changed and is responsible for the abruptchange in the chaotic area. The present system gives on the whole the chaotic regionsmaller than the original system.Iblinking vortex, chaotic stirring, stretching-folding process, horse-shoe map, l] merging and splitting of chaotic regionsl

• 社団法人日本物理学会の論文
• 1991-03-15

著者

• Suh Yong

  Department Of Biological And Environmental Chemistry Institute Of Agricultural Science And Technolog

• Suh Youg

  Department Of Mechanical Engineering Dong-a University

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