Self-Propulsion of Boiling Droplets on Thin Heated Oil Films
Fluid Dynamics
2022-03-02 v1 Applied Physics
Abstract
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.
Keywords
Cite
@article{arxiv.2203.00231,
title = {Self-Propulsion of Boiling Droplets on Thin Heated Oil Films},
author = {Victor Julio Leon and Kripa K. Varanasi},
journal= {arXiv preprint arXiv:2203.00231},
year = {2022}
}
Comments
Submitted and accepted to Physical Review Letters