エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
特集「超音波による霧化分離技術」
超音波霧化現象の可視化解析
土屋 活美林 秀哉藤原 和久松浦 一雄
著者情報
ジャーナル フリー

2011 年 26 巻 1 号 p. 11-17

詳細
抄録

It has been claimed in the literature that selective ethanol separation from ethanol-water solution can be made through ultrasonic atomization. The causes of separation were explained in terms of parametric decay instability of capillary waves, accumulating acoustic energy in a highly localized surface of the capillary wave and effecting ultrasonic atomization. In this study, the atomization process is examined visually with some mechanistic view, and the dynamics of interfacial oscillations occurring along the perturbed protrusion or conical “liquid column/fountain jet” over the ultrasonic transducer are analyzed by high-speed imaging. It is found that the atomization process could be initiated by a sudden increase in surface roughness of microscale, which would be viewed as localized surface patches of two-dimensional capillary waves, often associated with contraction expansion sequence of surface to-pology. Such surface patches could bring further instability in generating a swarm of liquid droplets of microscale around the expanded phase of liquid column.

著者関連情報
© 2011 日本エアロゾル学会
前の記事 次の記事
feedback
Top