1116 微細気泡の収縮・溶解過程(2)(OS11-3 ナノ・マイクロフルイディクス(マイクロ混相流),OS11 ナノ・マイクロフルイディクス,オーガナイズドセッション)

概要

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Dissolution process of micro-bubble plays an important role in the collapse. The contraction and dissolution processes of a spherical rising micro-bubble in water were investigated experimentally and numerically. We measured the bubble diameter and the velocity of a rising bubble using microscope that can follow the rising bubble in water. The experimental results show that the velocity of the rising bubble in water obeys nearly Stokes' law and hence the bubble behaves like a rigid particle in water. We also numerically calculated the time variation of bubble diameter by supposing a spherical bubble rising straight in water and using Rayleigh-Plesset equation and Sherwood number. It was found that the dissolution time of a bubble by the experiment is about 4 times slower than that by the calculation, and therefore the experimental results don't agree well with the numerical ones.
一般社団法人日本機械学会の論文
2007-11-17