Spontaneous ratchet effect in a granular gas

Meer van der, Devaraj and Reimann, Peter and Weele van der, Ko and Lohse, Detlef (2004) Spontaneous ratchet effect in a granular gas. Physical Review Letters, 92 (18). p. 184301. ISSN 0031-9007

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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 systemintrinsic 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.
Item Type:	Article
Copyright:	© 2004 The American Physical Society
Faculty:	Science and Technology (TNW)
Research Group:	Physics of Fluids (POF)
Link to this item:	http://purl.utwente.nl/publications/49048
Official URL:	http://dx.doi.org/10.1103/PhysRevLett.92.184301
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