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Dense bubble flow in a silo: An unusual flow of a dispersed medium
Phys. Rev. E 73, 056309 – Published 23 May, 2006
DOI: https://doi.org/10.1103/PhysRevE.73.056309
Abstract
The dense flow of air bubbles in a two-dimensional silo (through an aperture ) 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 and depends on the deformability of the particles.
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