Experimental Realization of a Rotational Ratchet in a Granular Gas

Peter Eshuis, Ko van der Weele, Detlef Lohse, Devaraj van der Meer

Research output: Contribution to journalArticle

  • 45 Citations

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
LanguageEnglish
Article number248001
Number of pages4
JournalPhysical review letters
Volume104
Issue number24
DOIs
StatePublished - 2010

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vanes
shaking
gases
sustaining
broken symmetry
convection
coatings

Keywords

  • METIS-266890
  • IR-79181

Cite this

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Experimental Realization of a Rotational Ratchet in a Granular Gas. / Eshuis, Peter; van der Weele, Ko; Lohse, Detlef ; van der Meer, Devaraj.

In: Physical review letters, Vol. 104, No. 24, 248001, 2010.

Research output: Contribution to journalArticle

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AU - Lohse,Detlef

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AB - 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

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KW - IR-79181

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DO - 10.1103/PhysRevLett.104.248001

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