Self-Propulsion of Liquid Marbles: Leidenfrost-Like Levitation Driven by the Marangoni Flow
Self-propulsion of liquid marbles filled with aqueous alcohol solutions and placed on a water surface is reported. The characteristic of velocity of the marbles is ca. 0.1 m/s. The phenomenon of self-propulsion is related to the Marangoni solutocapillary flow caused by the condensation of alcohol, evaporated from the liquid marble, on a water surface. The Marangoni flow in turn enhances the evaporation of alcohol from marbles. Addition of alcohol to the water supporting the marbles suppresses the self-propulsion. The propulsion of liquid marbles is mainly stopped by water drag. The velocity of the center of mass of marbles grows with the increase of the concentration of alcohol in a marble. The velocity of marbles’ self-propulsion is independent on their volume. Impact of external fields on the self-propulsion is discussed.
Host: Eli Sloutskin, Physics Department (phone. 03 - 738 4506; cell. 054 - 393 8246)
Those of you who may be interested in talking with Prof. Bormashenko should mail me (firstname.lastname@example.org), listing their preferred time.
תאריך עדכון אחרון : 05/12/2022