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How coalescing droplets jump
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Enright, Ryan, Miljkovic, Nenad, Sprittles, James E., Nolan, Kevin, Mitchell, Robert and Wang, Evelyn N. (2014) How coalescing droplets jump. ACS Nano, Volume 8 (Number 10). pp. 10352-10362. doi:10.1021/nn503643m ISSN 1936-0851.
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Official URL: http://dx.doi.org/10.1021/nn503643m
Abstract
Surface engineering at the nanoscale is a rapidly developing field that promises to impact a range of applications including energy production, water desalination, self-cleaning and anti-icing surfaces, thermal management of electronics, microfluidic platforms, and environmental pollution control. As the area advances, more detailed insights of dynamic wetting interactions on these surfaces are needed. In particular, the coalescence of two or more droplets on ultra-low adhesion surfaces leads to droplet jumping. Here we show, through detailed measurements of jumping droplets during water condensation coupled with numerical simulations of binary droplet coalescence, that this process is fundamentally inefficient with only a small fraction of the available excess surface energy (≲6%) convertible into translational kinetic energy. These findings clarify the role of internal fluid dynamics during the jumping droplet coalescence process and underpin the development of systems that can harness jumping droplets for a wide range of applications.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||||||
Journal or Publication Title: | ACS Nano | ||||||||
Publisher: | American Chemical Society | ||||||||
ISSN: | 1936-0851 | ||||||||
Official Date: | 18 September 2014 | ||||||||
Dates: |
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Volume: | Volume 8 | ||||||||
Number: | Number 10 | ||||||||
Page Range: | pp. 10352-10362 | ||||||||
DOI: | 10.1021/nn503643m | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Adapted As: |
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