title: Displacement of an Electrically Charged Drop on a Vibrating Bath.
abstract: In this work, the manipulation of an electrically charged droplet bouncing on a vertically vibrated bath is investigated. When a horizontal, uniform, and static electric field is applied to it, a motion is induced. The droplet is accelerated when the droplet is small. On the other hand, large droplets appear to move with a constant speed that depends linearly on the applied electrical field. In the latter regime, high-speed imaging of one bounce reveals that the droplet experiences an acceleration due to the electrical force during the flight and decelerates to 0 when interacting with the surface of the bath. Thus, the droplet moves with a constant average speed on a large time scale. We propose a criterion based on the force necessary to move a charged droplet at the surface of the bath to discriminate between constant speed and accelerated droplet regimes.
authors.affiliation: CESAM-GRASP, Physics Department, University of Liège, B-4000 Liège, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Brandenbourger
authors.affiliation: CESAM-GRASP, Physics Department, University of Liège, B-4000 Liège, Belgium.
authors.forename: N
authors.initials: N
authors.lastname: Vandewalle
authors.affiliation: CESAM-GRASP, Physics Department, University of Liège, B-4000 Liège, Belgium.
authors.forename: S
authors.initials: S
authors.lastname: Dorbolo