Nonequilibrium fluctuations in a frictional granular motor: Experiments and kinetic theory (Articolo in rivista)

Type
Label
  • Nonequilibrium fluctuations in a frictional granular motor: Experiments and kinetic theory (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevE.87.052209 (literal)
Alternative label
  • Andrea Gnoli (1); Alessandro Sarracino (2); Andrea Puglisi (2); Alberto Petri (3) (2013)
    Nonequilibrium fluctuations in a frictional granular motor: Experiments and kinetic theory
    in Physical review. E, Statistical, nonlinear, and soft matter physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Andrea Gnoli (1); Alessandro Sarracino (2); Andrea Puglisi (2); Alberto Petri (3) (literal)
Pagina inizio
  • art_n_052209 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pre.aps.org/pdf/PRE/v87/i5/e052209 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 87 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 5 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Istituto dei Sistemi Complessi-CNR and Dipartimento di Fisica, Università \"Sapienza,\" p.le A. Moro 2, 00185 Rome, Italy and Istituto dei Sistemi Complessi-CNR, via del Fosso del Cavaliere 100, 00133 Rome, Italy (2) Istituto dei Sistemi Complessi-CNR and Dipartimento di Fisica, Università \"Sapienza,\" p.le A. Moro 2, 00185 Rome, Italy (3) Istituto dei Sistemi Complessi-CNR, via del Fosso del Cavaliere 100, 00133 Rome, Italy (literal)
Titolo
  • Nonequilibrium fluctuations in a frictional granular motor: Experiments and kinetic theory (literal)
Abstract
  • We report the study of an experimental granular Brownian motor, inspired by the one published in Eshuis, but different in some ingredients. As in that previous work, the motor is constituted by a rotating blade, the surfaces of which break the rotation-inversion symmetry through alternated patches of different inelasticity, immersed in a gas of granular particles. The main difference of our experimental setup is in the orientation of the main axis, which is parallel to the (vertical) direction of shaking of the granular fluid, guaranteeing an isotropic distribution for the velocities of colliding grains, characterized by a variance v02. We also keep the granular system diluted, in order to compare with Boltzmann-equation-based kinetic theory. In agreement with theory, we observe the crucial role of Coulomb friction which induces two main regimes: (i) rare collisions, with an average angular velocity ??v03, and (ii) frequent collisions (FC), with ??v0. We also study the fluctuations of the angle spanned in a large-time interval ??, which in the FC regime is proportional to the work done upon the motor. We observe that the fluctuation relation is satisfied with a slope which weakly depends on the relative collision frequency. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it