Column and film lifetimes in bubble-induced two-liquid flow

Shungo Natsui, Ryota Nashimoto, Daiki Nakajima, Tatsuya Kikuchi, Ryosuke O. Suzuki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We investigated the transient behavior of immiscible two-liquid interfaces initiated by a single rising gas bubble and characterized by liquid "column" and "film" morphologies. To analyze the effect of the buoyancy force, viscosity, and interfacial tension on these morphologies, the single-solution density was controlled continuously by association with the rising velocity of the bubble. It was observed that the extension of the liquid column further into the upper liquid phase owing to the wake flow under the bubble is driven by the buoyancy force, with the velocity decreasing gradually with the distance between the bubble and the liquid-liquid interface. Based on this mechanism, we determined that a strong dimensionless correlation exists between the lifetime of the column and the physical properties of the two liquid phases. On the other hand, gravitational drainage does not affect the film lifetime. However, marginal pinching is dominant, probably owing to the existence of a surface tension gradient between the film and the meniscus.

Original languageEnglish
Article number062802
JournalPhysical Review E
Volume97
Issue number6
DOIs
Publication statusPublished - 2018 Jun 18
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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