Volume 65, Number 3, February 2004
|Page(s)||316 - 322|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 January 2004|
Block–to–granular-like transition in dense bubble flows
GRASP, Department of Physics B5, University of Liège B-4000 Liège, Belgium
Accepted: 5 November 2003
We have experimentally investigated 2-dimensional dense bubble flows underneath inclined planes. Velocity profiles and velocity fluctuations have been measured. A broad second-order phase transition between two dynamical regimes is observed as a function of the tilt angle θ. For low θ values, a block motion is observed. For high θ values, the velocity profile becomes curved and a shear velocity gradient appears in the flow.
PACS: 45.70.-n – Granular systems / 05.45.-a – Nonlinear dynamics and nonlinear dynamical systems / 81.05.Rm – Porous materials; granular materials
© EDP Sciences, 2004
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