   Bubble and granular flows: differences and similaritiesCaps, Hervé  ; Trabelsi, Samy ; Dorbolo, Stéphane et alin Physica A: Statistical Mechanics and its Applications (2004), 344(3-4), 424-430 We have experimentally studied the dense flow of identical bubbles below planes inclined at an angle theta. The flow is driven by the fast motion of dislocations. As a function of the density of ... [more ▼] We have experimentally studied the dense flow of identical bubbles below planes inclined at an angle theta. The flow is driven by the fast motion of dislocations. As a function of the density of dislocations (controlled by the parameter theta), a transition occurs between a simple collective block motion and a granular-like surface flow regime. (C) 2004 Elsevier B.V. All rights reserved. [less ▲] Detailed reference viewed: 22 (2 ULg)Block-to-granular-like transition in dense bubble flowsVandewalle, Nicolas ; Trabelsi, Samy ; Caps, Hervé in Europhysics Letters [=EPL] (2004), 65(3), 316-322 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 ... [more ▼] 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 theta. For low theta values, a block motion is observed. For high theta values, the velocity pro. le becomes curved and a shear velocity gradient appears in the flow. [less ▲] Detailed reference viewed: 18 (1 ULg) |
||
