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Inertial coalescence of droplets on a partially wetting substrate

Sui, Yi and Maglio, Marco and Spelt, Peter D. M. and Legendre, Dominique and Ding, Hang Inertial coalescence of droplets on a partially wetting substrate. (2013) Physics of Fluids, 25. 1-7. ISSN 1070-6631

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Official URL: http://dx.doi.org/10.1063/1.4824108

Abstract

We consider the growth rate of the height of the connecting bridge in rapid surface-tension-driven coalescence of two identical droplets attached on a partially wetting substrate. For a wide range of contact angle values, the height of the bridge grows with time following a power law with a universal exponent of 2/3, up to a threshold time, beyond which a 1/2 exponent results, that is known for coalescence of freely-suspended droplets. In a narrow range of contact angle values close to 90°, this threshold time rapidly vanishes and a 1/2 exponent results for a 90° contact angle. The argument is confirmed by three-dimensional numerical simulations based on a diffuse interface method with adaptive mesh refinement and a volume-of-fluid method.

Item Type:Article
Additional Information:Thanks to AIP editor. The original publication is available at http://scitation.aip.org
HAL Id:hal-00919847
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 - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Queen Mary University of London - QMUL (UNITED KINGDOM)
Other partners > University of Science and Technology of China - USTC (CHINA)
Laboratory name:
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Deposited On:17 Dec 2013 12:57

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