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research article

Drops on the Underside of a Slightly Inclined Wet Substrate Move Too Fast to Grow

Jambon-Puillet, Etienne
•
Ledda, Pier Giuseppe  
•
Gallaire, Francois  
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July 23, 2021
Physical Review Letters

Pendant drops suspended on the underside of a wet substrate are known to accumulate fluid from the surrounding thin liquid film, a process that often results in dripping. The growth of such drops is hastened by their ability to translate over an otherwise uniform horizontal film. Here we show that this scenario is surprisingly reversed when the substrate is slightly tilted (approximate to 2 degrees); drops become too fast to grow and shrink over the course of their motion. Combining experiments and numerical simulations, we rationalize the transition between the conventional growth regime and the previously unknown decay regime we report. Using an analytical treatment of the Landau-Levich meniscus that connects the drop to the film, we quantitatively predict the drop dynamics in the two flow regimes and the value of the critical inclination angle where the transition between them occurs.

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Type
research article
DOI
10.1103/PhysRevLett.127.044503
Web of Science ID

WOS:000677559400013

Author(s)
Jambon-Puillet, Etienne
Ledda, Pier Giuseppe  
Gallaire, Francois  
Brun, P-T
Date Issued

2021-07-23

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Letters
Volume

127

Issue

4

Article Number

044503

Subjects

Physics, Multidisciplinary

•

Physics

•

rayleigh-taylor instability

•

liquid

•

dynamics

•

bubbles

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LFMI  
Available on Infoscience
August 14, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/180588
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