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Atomization and Sprays
Facteur d'impact: 1.189 Facteur d'impact sur 5 ans: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2012005704
pages 409-429

DROP IMPACT ON SUPERHYDROPHOBIC SURFACES−VARYING GRAVITATIONAL EFFECTS

D. Duvivier
Universite de Mons−UMONS, Laboratoire de Physique des Surfaces et des Interfaces, Avenue Maistriau, 19, 7000 Mons, Belgium, Universite de Mons− UMONS, Centre de Recherches en Physique des Materiaux, Avenue Maistriau, 19, 7000 Mons, Belgium
Romain Rioboo
University of Mons, Faculty of Sciences, Place du Parc, Mons, 7000 Hainaut; Universite de Mons−UMONS, Laboratoire de Physique des Surfaces et des Interfaces, Avenue Maistriau, 19, 7000 Mons, Belgium; Centre de Recherches en Physique des Materiaux
M. Voue
Universite de Mons−UMONS, Centre de Recherches en Physique des Materiaux, Avenue Maistriau, 19, 7000 Mons, Belgium; Universite de Mons−UMONS, Laboratoire de Physique des Materiaux et Optique, Avenue Maistriau, 19, 7000 Mons, Belgium
J. De Coninck
Universite de Mons−UMONS, Laboratoire de Physique des Surfaces et des Interfaces, Avenue Maistriau, 19, 7000 Mons, Belgium; Universite de Mons−UMONS, Centre de Recherches en Physique des Materiaux, Avenue Maistriau, 19, 7000 Mons, Belgium

RÉSUMÉ

We performed in this experimental study impacts of aqueous ferrofluid drops on a superhydrophobic surface. The ferrofluids were used to simulate changes of the gravitational acceleration g* by applying different magnetic fields. It has been shown that a rebound/no rebound boundary can be obtained when plotting the impact results as a function of Weber, Reynolds, and Bond numbers, which quantify, respectively, effects of inertia over capillary ones, inertia over viscous dissipation, and gravity over capillary effects. On a We versus Re/Bon graph an optimum value of n close to 4 has been obtained by support vector machine analysis. Conditions to get rebound or no rebound have been established as functions of the impact parameters and of the liquid characteristics, but also of the body forces intensities.


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