Abstract
We construct a ratchet of the Smoluchowski-Feynman type, consisting of four vanes that are allowed to rotate freely in a vibrofluidized granular gas. The necessary out-of-equilibrium environment is provided by the inelastically colliding grains, and the equally crucial symmetry breaking by applying a soft coating to one side of each vane. The onset of the ratchet effect occurs at a critical shaking strength via a smooth, continuous phase transition. For very strong shaking the vanes interact actively with the gas and a convection roll develops, sustaining the rotation of the vanes
Original language | English |
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Article number | 248001 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 104 |
Issue number | 24 |
DOIs | |
Publication status | Published - 2010 |
Keywords
- METIS-266890
- IR-79181