title: Two-frequency forcing of droplet rebounds on a liquid bath.
abstract: Droplets can bounce indefinitely on a liquid bath vertically vibrated in a sinusoidal fashion. We here present experimental results that extend this observation to forcing signals composed of a combination of two commensurable frequencies. The Faraday and Goodridge thresholds are characterized. Then a number of vertical bouncing modes are reported, including walkers. The vertical motion can become chaotic, in which case the horizontal motion is an alternation of walk and stop.
authors.affiliation: Microfluidics Lab, Department of Aerospace and Mechanics, University of Liège, B-4000 Liège, Belgium.
authors.forename: Naresh
authors.initials: N
authors.lastname: Sampara
authors.affiliation: Microfluidics Lab, Department of Aerospace and Mechanics, University of Liège, B-4000 Liège, Belgium.
authors.forename: Tristan
authors.initials: T
authors.lastname: Gilet