| Issue |
Europhys. Lett.
Volume 65, Number 3, February 2004
|
|
|---|---|---|
| Page(s) | 316 - 322 | |
| Section | Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics | |
| DOI | https://doi.org/10.1209/epl/i2003-10103-6 | |
| 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
Received:
1
July
2003
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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