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Breakup of a pendant magnetic drop

Havard, Nicolas and Risso, Frédéric and Tordjeman, Philippe Breakup of a pendant magnetic drop. (2013) Physical Review E, 88 (1). 1-5. ISSN 1539-3755

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Official URL: http://dx.doi.org/10.1103/PhysRevE.88.013014

Abstract

We report experiments on a millimeter-sized pendant drop of ferrofluid in a horizontal magnetic field. The initial drop size is chosen just below the breakup threshold under gravity. As the magnetic field is increased, the drop tilts in order to align with the direction of the total volume force that is exerted on it: weight plus magnetic force. The breakup is controlled by a generalized Bond number based on this total force and on the radius of the neck of the drop. The evolution of drop shape turns out to be a complex process governed by many parameters such as the angle between the total force and the needle, the drop size relative to the needle radius, and the wettability of the liquid on the needle material. This suggests a certain universality, that a single value of the critical Bond number is found regardless of magnetic fluid properties and whether the force is inclined or not.

Item Type:Article
Additional Information:Thanks to APS editor. The original PDF can be found at Physical Review E website: http://pre.aps.org/abstract/PRE/v88/i1/e013014
HAL Id:hal-00904894
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Ecole Normale Supérieure de Lyon - ENS de Lyon (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:15 Nov 2013 13:39

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