Deformation and Flow of a Two-Dimensional Foam under Continuous Shear
Abstract
We investigate the flow properties of a 2D foam (a confined monolayer of jammed bubbles) submitted to a continuous shear in a Couette geometry. A strong localization of the flow at the moving inner wall is evidenced. Moreover, velocity fluctuations measurements reveal self-similar dynamical structures consisting of clusters of bubbles moving coherently. A stochastic model is proposed where bubbles rearrangements are activated by local stress fluctuations produced by the shearing wheel. This model gives a complete description of our observations and is also consistent with available data on granular shear bands.
- Publication:
-
Physical Review Letters
- Pub Date:
- October 2001
- DOI:
- 10.1103/PhysRevLett.87.178305
- arXiv:
- arXiv:cond-mat/0103440
- Bibcode:
- 2001PhRvL..87q8305D
- Keywords:
-
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Materials Science;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 5 pages, 2 figures