単一気ほうの崩壊による滴生成

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  • Drop Formation due to the Collapse of a Single Bubble
  • タンイツ キホウ ノ ホウカイ ニヨル テキセイセイ

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The paper presents the results of a study of drop formation due to the collapse of a single bubble at a gas-liquid interface in the Morton number range 2.52×10-119.3×10-8 and at bubble diameter 0.060.5 cm. A bubble collapsing at the interface produces some droplets at the bubble diameter smaller than the specific one and maximum height of rise of drop at the bubble diameter of about 2 mm.<BR>By means of dimensional analysis, correlations of diameter and projection velocity of the first drop are obtained in terms of the bubble diameter, the Morton and Ohnezorge number, and the Reynolds, Morton and Bond number, respectively. From consideration of the results, the critical point for drop formation is clarified. Furthermore, a simple model for drop formation reveals the contribution fraction of the surface energy released by the collapse cf a bubble to the kinetic energy of produced drops.

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