journal article·2014-10-28Open access

How Coalescing Droplets Jump

Ryan Enright, Nenad Miljkovic, James Sprittles, Kevin Nolan, Robert Mitchell, Evelyn N. Wang

ACS Nano· Volume 8· Issue 10

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.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Surface Modification and Superhydrophobicity · Fluid Dynamics and Heat Transfer · Electrohydrodynamics and Fluid Dynamics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Thermal Management Research Group, Efficient Energy Transfer (ηET) Department, Bell Laboratories Ireland, Alcatel-Lucent Ireland Ltd., Blanchardstown Business & Technology Park, Snugborough Road. Dublin 15, Ireland

Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States

Stokes Institute, University of Limerick, Limerick Ireland

Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States

Mathematics Institute, University of Warwick, Coventry CV4 7AL, United Kingdom

Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States

Funding

Office of Naval Research · European Commission Directorate-General for Research and Innovation · Basic Energy Sciences · Irish Research Council for Science, Engineering and Technology

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