title: Self-propelled Leidenfrost droplets.
abstract: We report that liquids perform self-propelled motion when they are placed in contact with hot surfaces with asymmetric (ratchetlike) topology. The pumping effect is observed when the liquid is in the Leidenfrost regime (the film-boiling regime), for many liquids and over a wide temperature range. We propose that liquid motion is driven by a viscous force exerted by vapor flow between the solid and the liquid.
authors.affiliation: Materials Science Institute and Physics Department, University of Oregon, Eugene, Oregon 97405-1274, USA. linke@uoregon.edu
authors.forename: H
authors.initials: H
authors.lastname: Linke
authors.forename: B J
authors.initials: BJ
authors.lastname: Alemán
authors.forename: L D
authors.initials: LD
authors.lastname: Melling
authors.forename: M J
authors.initials: MJ
authors.lastname: Taormina
authors.forename: M J
authors.initials: MJ
authors.lastname: Francis
authors.forename: C C
authors.initials: CC
authors.lastname: Dow-Hygelund
authors.forename: V
authors.initials: V
authors.lastname: Narayanan
authors.forename: R P
authors.initials: RP
authors.lastname: Taylor
authors.forename: A
authors.initials: A
authors.lastname: Stout