20920 収縮特性における気泡表面電位の影響(化学反応・複雑流体,一般講演)

概要

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Microbubbles have various unique chemical and physical characteristics in contrast to bubbles on the order of several tens of microns. Bubble size is very small with an average diameter of about 50μm. The microbubbles make their rise velocity very low and, therefore, they are easily improved the dissolution rate of gas within the bubbles. The gas-water interface of microbubble negatively charged. In this study, the effect of the electrical property of microbubbles on shrinking characteristic is investigated. Measurements of the electrical potential and shrinking pattern of microbubbles were carried out using microbubble generator with different slit angle (θ=30 and 60 deg). The shrinking rate for the θ=60 deg case becomes slower than that for the θ=30 deg case. Furthermore, the shrinking rate decreases with increasing electrical potential of microbubbles.
社団法人日本機械学会の論文
2009-03-05