Bursting bubble in a viscoplastic medium

Vatsal Sanjay*, Detlef Lohse, Maziyar Jalaal*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

When a rising bubble in a Newtonian liquid reaches the liquid-air interface, it can burst, leading to the formation of capillary waves and a jet on the surface. Here, we numerically study this phenomenon in a yield-stress fluid. We show how viscoplasticity controls the fate of these capillary waves and their interaction at the bottom of the cavity. Unlike Newtonian liquids, the free surface converges to a non-flat final equilibrium shape once the driving stresses inside the pool fall below the yield stress. Details of the dynamics, including flow energy budgets, are discussed. The work culminates in a regime map with four main regimes, all with different characteristic behaviours.

Original languageEnglish
Article numberA2
JournalJournal of fluid mechanics
Volume922
DOIs
Publication statusPublished - 10 Sep 2021

Keywords

  • UT-Hybrid-D

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