Abstract
The purpose of this study is to clarify the mutual relationship among the bubble motion, the surrounding liquid motion and the instantaneous mass transfer from the bubble to the liquid phase. For this specific purpose, the zigzag motion of the bubble were captured with high spatial resolution by a pair of high speed cameras, and instantaneous changes in volume and surface area of the bubble were obtained from the captured images by our originally developed method. The instantaneous mass transfer from the bubble to the surrounding liquid was enhanced at a section around the second inversion point. The enhancement in the mass transfer on the right side surface was dominant; hence the instantaneous mass transfer coefficient increased. In addition, in order to obtain the liquid motion induced by the bubble, Stereo-PIV measurement was conducted. As a result, the vortices were shed from the bubble rear in the sections. The vortices acted like transporting the liquid rich in dissolved CO_2 away from the bubble rear. The convective transportation was promoted; consequently the mass transfer was enhanced.
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