0129 上昇する気泡の運動と後流渦構造(OS1 噴流,後流および剥離流れ現象の探求と技術革新,オーガナイズドセッション)

抄録

Motion and wake vortices of a rising bubble of Re =246 in a still liquid in a vertical pipe are studied experimentally using photochromic tracer and high-speed cinematography. Three velocity components of bubble measured by video image processing show that zig-zag motion of the bubble is dominated by lateral velocities. And the shedding of vortex loops behind a bubble correlates well with lateral motion and orientation of the bubble. A stereo display system was constructed by commercial stereo display and used to examine the complex three-dimensional vortices and dye patters in the bubble wake.