Dimple drainage before the coalescence of a droplet deposited on a smooth substrate.
coalescence
drainage
drop
film
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
25 08 2020
25 08 2020
Historique:
pubmed:
14
8
2020
medline:
14
8
2020
entrez:
14
8
2020
Statut:
ppublish
Résumé
Thin liquid or gas films are everywhere in nature, from foams to submillimetric bubbles at a free surface, and their rupture leaves a collection of small drops and bubbles. However, the mechanisms at play responsible for the bursting of these films is still in debate. The present study thus aims at understanding the drainage dynamics of the thin air film squeezed by gravity between a millimetric droplet and a smooth solid or a liquid thin film. Solving coupled lubrication equations and analyzing the dominant terms in the solid- and liquid-film cases, we explain why the drainage is much faster in the liquid-film case, leading often to a shorter coalescence time, as observed in recent experiments.
Identifiants
pubmed: 32788366
pii: 2007857117
doi: 10.1073/pnas.2007857117
pmc: PMC7456156
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
20416-20422Commentaires et corrections
Type : ErratumIn
Déclaration de conflit d'intérêts
The authors declare no competing interest.
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