Self-propelled Leidenfrost droplets.

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.

[1]  Yutaka Sumino,et al.  Self-running droplet: emergence of regular motion from nonequilibrium noise. , 2004, Physical review letters.

[2]  Sigurd Wagner,et al.  Microfluidic actuation by modulation of surface stresses , 2003 .

[3]  D. Quéré,et al.  Self-propelling slugs , 2002, Journal of Fluid Mechanics.

[4]  Heiner Linke,et al.  Ratches and Brownian motors: Basics, experiments and applications , 2002 .

[5]  J. C. Chen,et al.  Fast drop movements resulting from the phase change on a gradient surface. , 2001, Science.

[6]  R. Fair,et al.  Electrowetting-based actuation of liquid droplets for microfluidic applications , 2000 .

[7]  D. Quéré,et al.  Liquid trains in a tube , 2000 .

[8]  Ichimura,et al.  Light-driven motion of liquids on a photoresponsive surface , 2000, Science.

[9]  John D. Bernardin,et al.  The Leidenfrost point : Experimental study and assessment of existing models , 1999 .

[10]  Dos Santos FD,et al.  Free-running droplets. , 1995, Physical review letters.

[11]  S. Chandra,et al.  Leidenfrost Evaporation of Liquid Nitrogen Droplets , 1994 .

[12]  Françoise Brochard-Wyart,et al.  Motions of droplets on hydrophobic model surfaces induced by thermal gradients , 1993 .

[13]  George M. Whitesides,et al.  How to Make Water Run Uphill , 1992, Science.

[14]  F. Brochard,et al.  Motions of droplets on solid surfaces induced by chemical or thermal gradients , 1989 .

[15]  Kenneth J. Bell,et al.  The leidenfrost phenomenon: film boiling of liquid droplets on a flat plate , 1966 .

[16]  L. Scriven,et al.  The Marangoni Effects , 1960, Nature.

[17]  P. Gennes,et al.  Capillarity and Wetting Phenomena , 2004 .

[18]  C. Marangoni.  Ueber die Ausbreitung der Tropfen einer Flüssigkeit auf der Oberfläche einer anderen , 1871 .

[19]  F. Young.  Untersuchungen über Schall und Licht , 2022 .