Abstract
The phenomenon of liquid entrainment by a gas bubble rising vertically across the interface between two immiscible liquid layers is addressed primarily by experiment. An analytical/empirical model is developed which predicts the volume of liquid entrained as a function of the bubble volume and the physical and transport properties of the two liquids. The entrainment efficiency is presented as a function of the reduced bubble volume and bubble Reynolds numbers in each fluid. When compared to the experimental data for eight immiscible liquid pairs, the correlation and the data exhibit good agreement.
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