213 流路壁面に付着した単一気泡の挙動

概要

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The purpose of this study is to investigate the behavior of a single bubble adhering to the wall in the steady uniform flow. We stuck a bubble on the wall in a channel filled with water, and measured the departure fluid velocity which means the velocity that the bubble is separated from the wall. At the same time, we took photographs of the behavior of the bubble by a high-speed camera. From the experimental results, the projected area of the bubble into flow direction is found to be dominant as a factor of the bubble shape to determine the departure fluid velocity. Furthermore, we derived a formula for the bubble departure fluid velocity from the equilibrium condition between the work done by the bubble departure and the work by the fluid drag, and confirmed that it agrees well with the experimental results.
社団法人日本機械学会の論文
2002-10-05