BUBBLES IN VISCOUS-LIQUIDS - SHAPES, WAKES AND VELOCITIES
BUBBLES IN VISCOUS-LIQUIDS - SHAPES, WAKES AND VELOCITIES
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DOI：
10.1017/s002211208100311x
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发表时间：
1981-01-01
影响因子：
3.7
通讯作者：
WEBER, ME
中科院分区：
文献类型：
--
作者：
BHAGA, D;WEBER, ME
测定了气泡在粘性液体中上升的形状和终端速度。对于大于4 × 10−3的莫顿数（M），阻力系数和无量纲气泡形状仅是雷诺数（R）的函数。形状制度和终端上升速度已相关。利用氢气泡示踪技术对上升气泡周围的流场进行了可视化研究。当M > 4 × 10−3和R < 110时，气泡尾随在闭合的层流环形尾流中。当R > 110时，尾流是开放的和不稳定的。通过以与气泡相同的速度升高电影照相机并拍摄H2示踪气泡来获得流动的流线。给出了R < 150和7·4 × 10−4 < M < 850的结果。
The shapes and terminal velocities of bubbles rising in viscous liquids have been determined. For Morton numbers (M) greater than 4 × 10−3 the drag coefficient and dimensionless bubble shape are functions only of Reynolds number (R). Shape regimes and terminal rise velocities have been correlated. The flow field around a rising bubble was visualized through the hydrogen bubble tracer technique. For M > 4 × 10−3 and R < 110 the bubbles trailed closed, laminar toroidal wakes. For R > 110 the wake was open and unsteady. Streamlines for the flow were obtained by raising a ciné camera at the same speed as the bubble and filming the H2 tracer bubbles. Results are presented for R < 150 and 7·4 × 10−4 < M < 850.