[en] Rain-induced foliar pathogen propagation is inherently
linked to raindrop fragmentation upon impact on infected leaves. Close
to leaf edges, the outcome of a drop impact is complex and asymmet-
ric. Despite the ubiquitous nature of impacts close to edges, little is
known on the role of edges in shaping drop fragmentation (edge-effect
fragmentation). To address this gap, we present a series of drop impact
experimental results with impact point close to the surface edge. We
focus on the liquid sheet expansion in the air and the role of the edge in
introducing the asymmetry in such expansion. We link the edge-induced
asymmetry of the sheet to the emergence of different families of droplet-
producing fragmentation processes. We discuss how our results can help
shed light on foliar disease transmission.
Disciplines :
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 fragmentation in the context of foliar disease transmission
Publication date :
November 2017
Event name :
70th Annual Meeting of the APS Division of Fluid Dynamics
