Bursting bubble in a viscoplastic medium

Vatsal Sanjay, Detlef Lohse, Maziyar Jalaal

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23 Citations (Scopus)
96 Downloads (Pure)


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
Early online date5 Jul 2021
Publication statusPublished - 10 Sept 2021


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