Large bubble rupture sparks fast liquid jet
Thomas S\'eon, Arnaud Antkowiak

TL;DR
This paper reports the discovery of fast liquid jets from large bubble ruptures, revealing a gravity-driven energy focusing mechanism with a universal scaling law involving bubble height.
Contribution
It introduces a novel experimental observation of jet formation from large bubbles and proposes a universal gravity-driven scaling law for jet velocity.
Findings
Jet velocity scales with bubble height to the power 3/2
Focusing is gravity-driven and independent of pinch-off singularity
Experimental validation across various fluid properties
Abstract
This Letter presents the novel experimental observation of long and narrow jets shooting out in disconnecting large elongated bubbles. We investigate this phenomenon by carrying out experiments with various viscosities, surface tensions, densities and nozzle radii. We propose a universal scaling law for the jet velocity, which unexpectedly involves the bubble height to the power 3/2. This anomalous exponent suggests an energy focusing phenomenon. We demonstrate experimentally that this focusing is purely gravity-driven and independent of the pinch-off singularity.
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Taxonomy
TopicsParticle Dynamics in Fluid Flows · Fluid Dynamics and Heat Transfer · Fluid Dynamics and Mixing
