Interaction of two spark generated bubbles beneath free surface

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• 作者：Chen Ji ; Bo Li ; Jun Zou ; ^{junzou@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Huayong Yang
• 关键词：Bubbles ; Free surface ; Interactions ; Collapse jet ; Surface jet
• 刊名：Experimental Thermal and Fluid Science
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：81
• 期：Complete
• 页码：76-83
• 全文大小：2372 K

文摘

The interactions of two oscillating bubbles beneath a free surface are studied with the help of high-speed photography. The collapse can produce liquid jets both in the bulk water and upon the free surface. Different interaction modes and surface jets are observed, which are significantly affected by the relative bubble-bubble distance and the relative depths below the free surface. The phenomena are summarized in a dimensionless parameter plot, where several regions are divided based on the collapse behavior. Particularly, a transition region is observed where different behaviors occur randomly. Based on the experimental results, the boundary lines between the regions are proposed in a wide range of parameters.