期刊
JOURNAL OF FLUID MECHANICS
卷 530, 期 -, 页码 369-378出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022112005003770
关键词
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The periodic generation, of bubbles by injection of a gas at constant flow rate through an orifice at the bottom of a quiescent liquid of high viscosity is investigated numerically. The volume of the bubbles is determined as a function of a capillary number and a Bond number in the absence of inertial effects. Pairs of bubbles coalesce in the vicinity of the orifice when the capillary number is higher than a critical value that depends on the Bond number, but the final volume of the bubbles still follows a wellknown scaling law at large capillary numbers. Qualitative experimental visualizations are presented that display the sequences of detachment and coalescence computed numerically.
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