Dynamics of Coalescence-Induced Jumping Water Droplets
Abstract
This fluid dynamics video shows the different interaction mechanisms of coalescence-induced droplet jumping during condensation on a nanostructured superhydrophobic surface. High speed imaging was used to show jumping behavior on superhydrophobic copper oxide and carbon nanotube surfaces. Videos demonstrating multi-jumping droplets, jumping droplet return to the surface, and droplet-droplet electrostatic repulsions were analyzed. Experiments using external electric fields in conjunction with high speed imaging in a custom built experimental chamber were used to show that all coalescence-induced jumping droplets on superhydrophobic surfaces become positively charged upon leaving the surface, which is detailed in the video.
Keywords
Cite
@article{arxiv.1310.2975,
title = {Dynamics of Coalescence-Induced Jumping Water Droplets},
author = {Nenad Miljkovic and Daniel J. Preston and Ryan Enright and Evelyn N. Wang},
journal= {arXiv preprint arXiv:1310.2975},
year = {2013}
}
Comments
4 pages, 0 figures, 2 ancillary videos