0907 ステレオPIVによる単一ジグザグ上昇気泡の周囲液相運動計測(OS9-2 混相流の多次元可視化計測,オーガナイズドセッション)

概要

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Our purpose is to elucidate the relationship between the bubble motion (zigzag motion and shape oscillation) and its surrounding liquid motion (obtained from Stereo PIV). We examined a zigzagging ascent bubble of 2.9 mm in equivalent diameter. At first, the surrounding liquid motion of the bubble was obtained quantitatively via Stereo PIV. Second, tomographic measurement of Stereo PIV was carried out in order to obtain the 3-D structure of surrounding liquid motion. From the Stereo PIV results, the relationship between the bubble motion (zigzag motion and shape oscillation) and the surrounding liquid motion was discussed. From these results, at y-z plane, it was considered that the asymmetry of the shape oscillation resulted in the velocity difference between the right and left sides of the bubble. Therefore, the bubble changed its direction of the motion due to the liquid-phase velocity difference between the right and left sides of the bubble.
一般社団法人日本機械学会の論文
2010-10-29