Self-Propulsion of Boiling Droplets on Thin Heated Oil Films

Autor:	Leon, Victor Julio, Varanasi, Kripa K.
Rok vydání:	2022
Předmět:	Physics - Fluid Dynamics Physics - Applied Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.127.074502
Popis:	We report on the self-propulsion of boiling droplets which, despite their contact with viscous, immiscible oil films, attain high velocities comparable to those of levitating Leidenfrost droplets. Experiments and model reveal that droplet propulsion originates from a coupling between seemingly disparate short and long timescale phenomena due to microsecond fluctuations induced by boiling events at the droplet-oil interface. This interplay of phenomena leads to continuous asymmetric vapor release and momentum transfer for high droplet velocities. Comment: Submitted and accepted to Physical Review Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2203.00231 Zobrazit plný text záznamu View this record from Arxiv