Poster (Scientific congresses and symposiums)
Walking droplets in confined geometries
Filoux, Boris; Hubert, Maxime; Schlagheck, Peter et al.
2016Mécamolle
 

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Keywords :
Fluid Mechanics; Bouncing Droplets; Faraday Instability
Abstract :
[en] When gently placing a droplet onto a vertically vibrated bath, under specific conditions, coalescence may be avoided. The drop bounces permanently. Upon increasing the forcing acceleration, the drop interacts with the wave it generates, and becomes a walker [1,2]. Recently, some 2D confining systems for walking droplets have been developed: cylindrical cavity, harmonic potential or the use of Coriolis force [3,4]. In addition, the interactions between two identical walkers have been studied in a 2D case [5]. Nevertheless, no study focuses on 1D dynamics and their properties. In this work, we show it is possible to confine a walker in a quasi mono-dimensional geometry by using a submerged annular cavity. We focus on the interactions between droplets, and show the interdistance quantization. Then, we study the speed of pairs of walkers and show that the distance between the drops affects the group speed: the closer the drops are, the faster they move. We also propose a numerical model to characterize the distance quantization, and the evolution of the speed of a string of droplets. Finally, we investigate the case of a string of droplets. We discuss the influence of the number of droplets and the distance between droplets on the string speed. 1. Y. Couder, S. Protière, E. Fort, and A. Boudaoud, Nature 437, 208 (2005).
 2. S. Protière, A. Boudaoud, and Y. Couder, J. Fluid Mech. 554, 85 (2006).
 3. S. Perrard, M. Labousse, M. Miskin, E. Fort, and Y. Couder, Nat. Commun. 5, 3219 (2014).
 4. M. Labousse and S. Perrard, Phys. Rev. E 90, 022913 (2014).
 5. C. Borghesi, J. Moukhtar, M. Labousse, A. Eddi, E. Fort, and Y. Couder, Phys. Rev. E 90, 063017 (2014).
Disciplines :
Physics
Author, co-author :
Filoux, Boris ;  Université de Liège > Département de physique > Physique statistique
Hubert, Maxime ;  Université de Liège > Département de physique > Physique statistique
Schlagheck, Peter ;  Université de Liège > Département de physique > Physique quantique statistique
Vandewalle, Nicolas  ;  Université de Liège > Département de physique > Physique statistique
Language :
English
Title :
Walking droplets in confined geometries
Publication date :
12 October 2016
Event name :
Mécamolle
Event organizer :
ULg - Université de Liège
Event place :
Liège, Belgium
Event date :
12.10.2016
Name of the research project :
Quandrops
Funders :
ARC Quandrops
Available on ORBi :
since 12 January 2017

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