Edge effect: Liquid sheet and droplets formed by drop impact close to an edge

[en] Asymmetric liquid sheet fragmentation is ubiquitous in nature and potentially shapes critical phenomena such as rain-induced propagation of foliar diseases. In this experimental study, we investigate the formation and fragmentation of a liquid sheet upon impact of a drop close to the edge of a solid substrate. Both the impact Weber number and the offset, the distance from the impact point to the edge, are systematically varied. Their influence on the kinematics of the liquid sheet and the subsequent statistics of droplet ejection are rationalized. Three major asymmetry scenarios are identified and linked to distinct droplet ejection patterns. Scaling laws are proposed to rationalize these scenarios based on impact parameters.

Disciplines :

Engineering, computing & technology: Multidisciplinary, general & others
Mechanical engineering

Author, co-author :

Lejeune, Sophie ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Microfluidique

Gilet, Tristan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Microfluidique

Bourouiba, Lydia; Massachusetts Institute of Technology - MIT > Civil and Environmental Engineering > The Fluid Dynamics of Disease Transmission Laboratory

Language :

English

Title :

Edge effect: Liquid sheet and droplets formed by drop impact close to an edge

Publication date :

07 August 2018

Journal title :

Physical Review Fluids

ISSN :

2469-9918

eISSN :

2469-990X

Publisher :

American Physical Society

Volume :

Pages :

083601

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique
USDA NIFA - United States. Department of Agriculture. National Institute of Food and Agriculture

Funding number :

USDA-NIFA Specialty Crop Research Initiative Grant Award No. MDW-2016-04938

Funding text :

MIT REED and Edgerton Funds

Available on ORBi :

since 31 August 2018

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