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arXiv · 2610.39586

On the rise of a Taylor bubble-drop assembly in a vertical tube

Quan Yao·Guangzhao Zhou
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Abstract

In a liquid-filled vertical tube, a Taylor drop typically rises far more slowly than a Taylor bubble owing to the much larger density and dynamic viscosity of the former. In this work, we demonstrate experimentally and numerically that instead of being slowed down by the attached drop, a Taylor bubble-drop assembly rises at the same velocity as an isolated Taylor bubble, leading to a significantly faster rise of the Taylor drop. We discuss the underlying mechanism and use an analytical model to predict the drop radius within the assembly. This phenomenon offers a means for bubble-assisted rapid transport of an immiscible liquid phase in vertical tubes, with potential applicability in gas-lifting systems in confined environments.

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Quan Yao, Guangzhao Zhou. 2026-10-29. On the rise of a Taylor bubble-drop assembly in a vertical tube. https://arxiv.org/abs/2610.39586

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