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‘Fines’ from the collision of liquid rims

Published online by Cambridge University Press:  22 April 2020

B. Néel Open the ORCID record for B. Néel [Opens in a new window] ,
H. Lhuissier Open the ORCID record for H. Lhuissier [Opens in a new window]  and
E. Villermaux Open the ORCID record for E. Villermaux [Opens in a new window]
B. Néel
Affiliation:
Aix-Marseille Université, CNRS, Centrale Marseille, IRPHE, Marseille, France
H. Lhuissier
Affiliation:
IUSTI, CNRS, Aix-Marseille Université, 13453Marseille, France
E. Villermaux*
Affiliation:
Aix-Marseille Université, CNRS, Centrale Marseille, IRPHE, Marseille, France Institut Universitaire de France, Paris, France
*
†Email address for correspondence: emmanuel.villermaux@univ-amu.fr
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Abstract

Fines are smaller droplets produced from an auxiliary mechanism besides the formation of the standard drops in a fragmentation process. We report their formation in a controlled experiment which isolates an individual fragmentation protocol: the collision of two rims bordering growing adjacent holes on a liquid sheet. The standard drops come from the capillary breakup of the fused rims. Occasionally, the rims collision is strong enough to trigger a new, splash-like mechanism, producing an expanding lamellae perpendicular to the main sheet, which destabilizes into finer drops. We quantify the threshold condition for the onset of this mechanism first discovered by Lhuissier & Villermaux (J. Fluid Mech., vol. 714, 2013, pp. 361–392), we document the resulting lamellae dynamics and explain why it affects the mean drop size in the spray, broadening substantially the overall drop size distribution, which we determine. Possible applications of these findings are mentioned.

JFM classification

Interfacial Flows (free surface): Thin films
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 893 , 25 June 2020 , A16
Copyright
© The Author(s), 2020. Published by Cambridge University Press

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Footnotes

The original version of this article was published with incorrect author information. A notice detailing this has been published and the error rectified in the online PDF and HTML copies.

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