Dynamics of an initially spherical bubble rising in quiescent liquid

Tripathi, M K and Sahu, K C and Govindarajan, R (2015) Dynamics of an initially spherical bubble rising in quiescent liquid. Nature Communications, 6 (6268). ISSN 2041-1723

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The beauty and complexity of the shapes and dynamics of bubbles rising in liquid have fascinated scientists for centuries. Here we perform simulations on an initially spherical bubble starting from rest. We report that the dynamics is fully three-dimensional, and provide a broad canvas of behaviour patterns. Our phase plot in the Galilei–Eötvös plane shows five distinct regimes with sharply defined boundaries. Two symmetry-loss regimes are found: one with minor asymmetry restricted to a flapping skirt; and another with marked shape evolution. A perfect correlation between large shape asymmetry and path instability is established. In regimes corresponding to peripheral breakup and toroid formation, the dynamics is unsteady. A new kind of breakup, into a bulb-shaped bubble and a few satellite drops is found at low Morton numbers. The findings are of fundamental and practical relevance. It is hoped that experimenters will be motivated to check our predictions.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: Physical sciences, Applied physics, Fluids and plasma physics,
Subjects: Chemical Engineering > Biochemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 30 Jan 2015 06:49
Last Modified: 03 May 2015 11:43
URI: http://raiith.iith.ac.in/id/eprint/1333
Publisher URL: http://dx.doi.org/10.1038/ncomms7268
OA policy: http://www.sherpa.ac.uk/romeo/issn/2041-1723/
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