Spontaneous Ratchet Effect in a Granular Gas
- 4 May 2004
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 92 (18), 184301
- https://doi.org/10.1103/physrevlett.92.184301
Abstract
The spontaneous clustering of a vibrofluidized granular gas is employed to generate directed transport in two different compartmentalized systems: a granular fountain in which the transport takes the form of convection rolls, and a granular ratchet with a spontaneous particle current perpendicular to the direction of energy input. In both instances, transport is not due to any system-intrinsic anisotropy, but arises as a spontaneous collective symmetry breaking effect of many interacting granular particles. The experimental and numerical results are quantitatively accounted for within a flux model.Keywords
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