Abstract
Mass transfer from a bubble should be understood in consideration of a relationship between the bubble motion and the surrounding liquid motion. This paper focused on bubbles categorized into 2-3mm in diameter. The bubbles commonly show the highest mass transfer rate, zigzagging ascent motion, and periodical vortex shedding. The relationship between the mass transfer and the motions of the bubble or the surrounding liquid motion are not found, but it is essential. For the fulfillment of the objective, we conducted experiments of capturing the projection images of the bubble with two high-speed cameras. The change in the bubble volume was calculated from the captured images based on an original image analysis. The mass transfer was enhanced in certain sections in which the bubble was accelerated and vortices were shed. The mass transfer enhancement arose from the acceleration and vortex shedding.
