二酸化炭素気泡の溶解過程のダイナミクス(<特集>第14回動力・エネルギー技術シンポジウム)

概要

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Mass transfer and flow structure of gas-liquid two-phase flows are essential in a chemical reactor, bio reactor and so on. In this research, a mass transfer process of a single rising bubble is investigated by using LIF (Laser Induced Fluorescence) measurement. We examined single ascending bubbles of 2-3mm in equivalent diameter, which have the highest mass transfer rate. However their flow structure and mass transportation process are complicated because they show zigzagging or spiraling motion in rest water. We visualized both the mass transfer from bubble to water, and wake of the single zigzag ascending bubble via LIF. Next, the relation between mass transfer and shape oscillations of the bubble interface is discussed. We compared the process of mass transportation 2.3mm and 2.9mm bubbles. From these results, we conclude that the shape oscilations are considered to play an important role in mass transportation of CO_2 bubbles.
2010-03-25