狭間げき内の偏平気泡に関する研究

概要

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The movement of a single bubble in an extremely narrow channel whose size ranged from 40 μm to 200 μm in height and l0 mm to 30 mm in width was investigated experimentally. R113 and nitrogen were used as the test fluids. In the 40 μm channels, the velocity of the bubble approached about twice that of the liquid, which agreed with Tanveer's analysis of a single two-dimensional bubble in a Hele-Shaw cell with side walls where surface tension is small. However, in larger channels, inertial effect made the velocity ratio between the bubble and the liquid smaller. Simultaneously, the aspect ratio of the bubble also decreased, though it agreed well with Tanveer's analysis when the channel was narrower. The breakup condition of the bubble on account of the viscous instability was also examined.
社団法人日本機械学会の論文
1993-04-25