title: Bouncing jet: a Newtonian liquid rebounding off a free surface.
abstract: We find that a liquid jet can bounce off a bath of the same liquid if the bath is moving horizontally with respect to the jet. Previous observations of jets rebounding off a bath (e.g., the Kaye effect) have been reported only for non-Newtonian fluids, while we observe bouncing jets in a variety of Newtonian fluids, including mineral oil poured by hand. A thin layer of air separates the bouncing jet from the bath, and the relative motion replenishes the film of air. Jets with one or two bounces are stable for a range of viscosity, jet flow rate and velocity, and bath velocity. The bouncing phenomenon exhibits hysteresis and multiple steady states.
authors.affiliation: Center for Nonlinear Dynamics and Department of Physics, University of Texas at Austin, Austin, Texas 78712, USA. thrasher@chaos.utexas.edu
authors.forename: Matthew
authors.initials: M
authors.lastname: Thrasher
authors.forename: Sunghwan
authors.initials: S
authors.lastname: Jung
authors.forename: Yee Kwong
authors.initials: YK
authors.lastname: Pang
authors.forename: Chih-Piao
authors.initials: CP
authors.lastname: Chuu
authors.forename: Harry L
authors.initials: HL
authors.lastname: Swinney