Dynamics of a grain on a sandpile model Export

@article{quartier2000, 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 straight phi(d), the roller always stops, for angles larger than straight phi(s), it spontaneously starts rolling down. But for angles between straight phi(d) and straight 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 straight phi(s) corresponds to the angle for which the trap disappears; the dynamical angle straight 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.}, address = {Laboratoire de Physique Statistique de l'ENS, 24 rue Lhomond, 75231 Paris Cedex 05, France.}, author = {Quartier, L. and Andreotti, B. and Douady, S. and Daerr, A.}, citeulike-article-id = {2477381}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/11138128}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=11138128}, issn = {1063-651X}, journal = {Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics}, keywords = {grain, grain\_flow, granular, granular\_flow, heap\_formation, sand\_pile}, month = {December}, number = {6 Pt B}, pages = {8299--8307}, posted-at = {2008-03-06 06:40:49}, priority = {2}, title = {Dynamics of a grain on a sandpile model}, url = {http://view.ncbi.nlm.nih.gov/pubmed/11138128}, volume = {62}, year = {2000} }

TY - JOUR ID - quartier2000 L3 - citeulike-article-id:2477381 N2 - 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 straight phi(d), the roller always stops, for angles larger than straight phi(s), it spontaneously starts rolling down. But for angles between straight phi(d) and straight 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 straight phi(s) corresponds to the angle for which the trap disappears; the dynamical angle straight 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. IS - 6 Pt B JF - Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics SN - 1063-651X AD - Laboratoire de Physique Statistique de l'ENS, 24 rue Lhomond, 75231 Paris Cedex 05, France. EP - 8307 TI - Dynamics of a grain on a sandpile model VL - 62 SP - 8299 KW - grain KW - grain_flow KW - granular KW - granular_flow KW - heap_formation KW - sand_pile AU - Quartier, L AU - Andreotti, B AU - Douady, S AU - Daerr, A PY - 2000/12// UR - http://view.ncbi.nlm.nih.gov/pubmed/11138128 ER -