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Titolo: Dynamics of a grain on a sandpile model
Autore: Quartier, L; Andreotti, B; Douady, S; Daerr, A;
 Indirizzi:
 ENS, Lab Phys Stat, F75231 Paris 05, France ENS Paris France 05ENS, Lab Phys Stat, F75231 Paris 05, France
 Titolo Testata:
 PHYSICAL REVIEW E
fascicolo: 6,
volume: 62,
anno: 2000,
parte:, B
pagine: 8299  8307
 SICI:
 1063651X(200012)62:6<8299:DOAGOA>2.0.ZU;2P
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 BUMPY INCLINED LINE; SINGLEPARTICLE; MOTION; SURFACE; FRICTION; PLANE;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Physical, Chemical & Earth Sciences
 discip_EC
 Citazioni:
 12
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Quartier, L ENS, Lab Phys Stat, 24 Rue Lhomond, F75231 Paris 05, France ENS 24 Rue Lhomond Paris France 05 , F75231 Paris 05, France



 Citazione:
 L. Quartier et al., "Dynamics of a grain on a sandpile model", PHYS REV E, 62(6), 2000, pp. 82998307
Abstract
The dynamics of a macroscopic grain rolling on an inclined plane composed of fixed identical grains is investigated both experimentally and theoretically. As real sand, the system exhibits an hysteretic transition between static and dynamical states: for angles smaller than phi (d), the roller always stops, for angles larger than phi (s), it spontaneously starts rolling down. But for angles between phi (d) and phi (s), it can be either at rest or in motion with a constant velocity. It is shown that the limit velocity is given by the equilibrium between gravity driving and dissipation by the shocks. Moreover, the rough plane acts as a periodic potential trap whose width and depth decrease when the angle is increased: the static angle phi (s) corresponds to the angle for which the trap disappears; the dynamical angle phi (d) to that for which the limit velocity is sufficient to escape from the trap. Finally, a continuous description of the force globally acting on the grain is proposed, which preserves this hysteretic behavior.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 15:43:57