[en] 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/Bo$^n$ 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.
Centre de recherche :
CRPM - Physique des matériaux
Disciplines :
Physique
Auteur, co-auteur :
Duvivier, Damien ; Université de Mons > Faculté des Sciences > Laboratoire de Physique des Surfaces et Interfaces
Rioboo, Romain ; Université de Mons > Unités externes > ASBL YOUFM ; Université de Mons > Faculté des Sciences > Laboratoire de Physique des Surfaces et Interfaces
Voué, Michel ; Université de Mons > Faculté des Sciences > Service de Physique des matériaux et Optique
De Coninck, Joël ; Université de Mons > Faculté des Sciences > Service du Laboratoire de Physique des Surfaces et Interfaces
Langue du document :
Anglais
Titre :
Drop impact on superhydrophobic surfaces -- Varying gravitational effects
Date de publication/diffusion :
29 octobre 2012
Titre du périodique :
Atomization and Sprays
ISSN :
1044-5110
Maison d'édition :
Begell House
Volume/Tome :
22
Fascicule/Saison :
5
Pagination :
409-429
Peer reviewed :
Peer reviewed
Unité de recherche :
S877 - Laboratoire de Physique des Surfaces et Interfaces S878 - Physique des matériaux et Optique
Institut de recherche :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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