LAUSR

Abstract Bubble passing through interface of immiscible liquids has great importance in many industrial applications. In this paper, theoretical aspects on evaluating the bubble and liquid-liquid interface interaction are discussed and a novel experimental procedure is implemented to produce a single bubble of precise volume. In this procedure, unlike the previous experimental studies, unwanted randomly rotational forces on the bubble surface is eliminated and repeatability of the experiments is guaranteed. According to the experiments, meaningful dimensionless numbers are introduced and their exact threshold values are reported for the initiation/termination of specific interfacial phenomena. The effect of asymmetry in bubble shape and its rising pathway is also studied. Finally, based on experimental results of the bubble production method, the theoretical equations are modified and a novel volume-based method for measuring interfacial tension is developed.