Force measurements on rising bubbles
Force measurements on rising bubbles
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DOI：
10.1017/s0022112006002928
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发表时间：
2006-11
影响因子：
3.7
通讯作者：
Woodrow L. Shew;Sébastien Poncet;J. Pinton
中科院分区：
文献类型：
--
作者：
Woodrow L. Shew;Sébastien Poncet;J. Pinton
利用超声测速技术结合高速摄像技术研究了毫米级气泡在静水中上升的动力学过程。从速度和三维轨迹的测量，我们计算时间分辨精确的阻力和升力的气泡，这引起平面曲折和三维螺旋运动。力和振荡气泡运动的时间相关性，特别是升力，强调了在以前的研究中发现的尾涡的重要性。
The dynamics of millimetre-sized air bubbles rising through still water are investigated using ultrasound velocimetry combined with high-speed video. From measurements of speed and three-dimensional trajectories we calculate time-resolved precise drag and lift forces on the bubble, which give rise to planar zigzag and three-dimensional spiralling motion. Temporal correlations of forces and the oscillatory bubble motions, particularly the lift force, emphasize the importance of the wake vortices found in previous studies.