Article (Scientific journals)
From a bouncing compound drop to a double emulsion
Terwagne, Denis; Gilet, Tristan; Vandewalle, Nicolas et al.
2010In Langmuir, 26 (14), p. 11680
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Keywords :
Droplet; Emulsion; Microfluidics
Abstract :
[en] We show that a double emulsion (oil in water in oil) can be created starting from a compound droplet (surfactant solution in oil). The compound drop bounces on a vertically vibrated liquid surface. When the amplitude of the vibration exceeds a threshold value, the oil layer penetrates the water content and leaves a tiny oil droplet within. As this phenomenon occurs at each vigorous impact, the compound drop progressively transforms into a double emulsion. The emulsification threshold, which is observed to depend on the forcing frequency but not on the drop size, is rationalized by investigating the impact of compound drops onto a static liquid surface. The droplet creation occurs when the kinetic energy released at impact is larger than the energy required to deform the compound drop, namely when the Weber number is higher than a given threshold value.
Disciplines :
Physics
Author, co-author :
Terwagne, Denis ;  Université de Liège - ULiège > Département de physique > Physique statistique
Gilet, Tristan  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Micro mécanique
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Dorbolo, Stéphane  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
From a bouncing compound drop to a double emulsion
Publication date :
2010
Journal title :
Langmuir
ISSN :
0743-7463
eISSN :
1520-5827
Publisher :
American Chemical Society, Washington, United States - District of Columbia
Volume :
26
Issue :
14
Pages :
11680
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 26 June 2010

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