Influence of viscosity, surface tension, and inclination angle on motion of long bubbles in closed tubes

Abstract

An experimental study has been made of the motion oflong bubbles in closed tubes. The influence of viscosity and surface tension on the bubble velocity is clarified. A correlation of bubble velocities in vertical tubes is suggested and is shown to be useful for the whole range of parameters investigated. In addition, the effect of tube inclination angle on bubble velocity is presented, and certain features of the flow are described qualitatively.

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