The movement of single large bubbles in closed vertical tubes
The movement of single large bubbles in closed vertical tubes
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单个大气泡在封闭垂直管中的运动
DOI：
10.1017/s0022112062001068
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发表时间：
1962
影响因子：
3.7
通讯作者：
S. G. Mason
中科院分区：
文献类型：
--
作者：
H. Goldsmith;S. G. Mason
研究了在重力作用下，单个大气泡在封闭垂直管内悬浮于润湿液体中的流动和变形。通过显微镜直接观察，确定气泡周围的液膜的两相流动模式和厚度以及气泡末端的形状。定量协议与理论有关的气泡速度在粘性流中的膜厚度，并在惯性流的管半径。在粘性流中，在给定的界面张力下，变形与气泡长度和悬浮液的粘度无关。在粘性流中，沉降气泡的末端是球形的，其前端是长球形的，而后端通常是扁球形的。随着界面张力的增加，前端的轴比增加。波扰动发生在气泡的尾端。在惯性流中，上升气泡的前端呈半球形。
The flow and deformation of single large air and liquid bubbles suspended in wetting liquids when moving under gravity in closed vertical tubes have been studied. The flow patterns in both phases and thickness of the liquid film surrounding the bubbles and the shape of the bubble ends were determined by direct observation through a microscope. Quantitative agreement with a theory relating bubble velocity to film thickness in viscous flow, and to the tube radius in inertial flow was obtained. In viscous flow the deformation at a given interfacial tension was independent of bubble length and of the viscosity of the suspending liquid. In viscous flow the end of the sedimenting bubbles were spheroidal, with the leading ends prolate and the trailing ends generally oblate. The axis ratio of the leading ends increased with increasing interfacial tension. Wave disturbances occurred at the trailing ends of the bubbles. In inertial flow the leading ends of rising air bubbles were hemispherical.