Article (Scientific journals)
Air bubbles under vertical vibrations
Zoueshtiagh, F.; Caps, Hervé; Legendre, M. et al.
2006In European Physical Journal E. Soft Matter, 20 (3), p. 317-325
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Abstract :
[en] This paper reports on an experimental study of the splitting instability of an air bubble a few centimetres in diameter placed in a sealed cylindrical cell filled with liquid and submitted to vertical oscillations. The response of the bubble to the oscillations is observed with a high-speed video camera. It is found that the bubble dynamics is closely associated with the acceleration of the cell Gamma. For small acceleration values, the bubble undergoes minor shape deformations. With increasing acceleration values, these deformations are amplified and for sufficiently large Gamma the bubble becomes toroidal. The bubble may then become unstable and split into smaller parts. The onset of bubble division is studied and its dependency on physical parameters such as the fluid viscosity, the fluid surface tension and the initial size of the bubble is presented. It is found that the criterion for the bubble splitting process is associated with a threshold based on the acceleration of the oscillations. Above this threshold, the number of bubbles present in the cell is observed to grow until a final steady state is reached. Data analysis reveals that the final bubble size may be characterized in terms of Bond number.
Disciplines :
Chemistry
Materials science & engineering
Physics
Author, co-author :
Zoueshtiagh, F.
Caps, Hervé ;  Université de Liège - ULiège > Département de physique > Optofluidique
Legendre, M.
Vandewalle, Nicolas  ;  Université de Liège - ULiège > Département de physique > Physique statistique
Petitjeans, P.
Kurowski, P.
Language :
English
Title :
Air bubbles under vertical vibrations
Publication date :
July 2006
Journal title :
European Physical Journal E. Soft Matter
ISSN :
1292-8941
eISSN :
1292-895X
Publisher :
Springer, New York, United States - New York
Volume :
20
Issue :
3
Pages :
317-325
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 August 2009

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