Drop impact on superhydrophobic surfaces -- Varying gravitational effects

[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.

Research center :

CRPM - Physique des matériaux

Disciplines :

Physics

Author, co-author :

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

Language :

English

Title :

Drop impact on superhydrophobic surfaces -- Varying gravitational effects

Publication date :

29 October 2012

Journal title :

Atomization and Sprays

ISSN :

1044-5110

Publisher :

Begell House

Volume :

Issue :

Pages :

409-429

Peer reviewed :

Peer reviewed

Research unit :

S877 - Laboratoire de Physique des Surfaces et Interfaces
S878 - Physique des matériaux et Optique

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux

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since 29 October 2012

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