[en] The dense flow of air bubbles in a two-dimensional silo (through an aperture D) filled with a liquid is studied experimentally. A particle tracking technique has been used to bring out the main properties of the flow: displacements of the bubbles, transverse, and axial velocities. The behavior of the air bubbles is observed to present similarities with nondeformable solid grains in a granular flow. Nevertheless, a correlation between the bubble velocities and their deformations has been evidenced. Moreover, a new discharge law (Beverloo like) must be considered for such a system, where the flow rate is observed to vary as D-1/2 and depends on the deformability of the particles.
Disciplines :
Physics
Author, co-author :
Bertho, Y.
Becco, Christophe ; Université de Liège - ULiège > Département de physique > Physique statistique
Vandewalle, Nicolas ; Université de Liège - ULiège > Département de physique > Physique statistique
Language :
English
Title :
Dense bubble flow in a silo: An unusual flow of a dispersed medium
Publication date :
May 2006
Journal title :
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
ISSN :
1539-3755
eISSN :
1550-2376
Publisher :
American Physical Soc, College Pk, United States - Maryland
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