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Unsteady rising of clean bubble in low viscosity liquid

Gordillo, José Manuel and Lalanne, Benjamin and Risso, Frédéric and Legendre, Dominique and Tanguy, Sébastien Unsteady rising of clean bubble in low viscosity liquid. (2012) Bubble Science, Engineering and Technology, 4 (1). 4-11. ISSN 1758-8960

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Official URL: http://dx.doi.org/10.1179/1758897912Y.0000000002

Abstract

When a submerged bubble is initially at rest in a stagnant low viscosity liquid such as water, buoyancy forces accelerate the bubble upwards. The increasing relative velocity of the bubble with the surrounding liquid provokes deformations on the bubble shape that affect its vertical acceleration and also induce surface tension driven oscillations. Our theoretical model, which is compared with full Navier–Stokes simulations predicts, with a reasonable accuracy, both the position of the bubble centre of mass, as well as the time varying bubble shape under those conditions for which the Reynolds number is large, the amplitude of the deformation is small, the bubble interface is free of surfactants and the bubble rises following a straight vertical path. The model can be used as a first approximation to describe the initial instants of the unsteady buoyancy driven rising of millimetre sized bubbles typically generated in water aerators.

Item Type:Article
Additional Information:Thanks to Maney Publishing editor. The original PDF of the article can be found at Bubble Science, Engineering and Technology website : http://www.sciencedirect.com/science/journal/00406031
HAL Id:hal-00920787
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidad de Sevilla (SPAIN)
Laboratory name:
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Deposited By: Frederic RISSO
Deposited On:19 Dec 2013 09:56

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