title: Intermittency of energy in rapid granular shear flows.
abstract: Hard-disk simulations are used for two-dimensional rapid granular shear flows of circular disks between two rotating cylinders. The intermittency effects associated with the rate of the energy dissipation of collisions are studied. The statistics of intermittent signals of energy dissipation reveals that a power law governs the dynamics of rapid shear granular flows. A dynamical system approach based on the Gledzer-Ohkitani-Yamada shell model of turbulence is employed to reproduce signals for energy dissipation that are statistically consistent with those from simulations. The results suggest that rapid granular flows can be analyzed by appropriate turbulent models.
authors.affiliation: Department of Energy Technology, Lappeenranta University of Technology, P.O. Box 20, 53851-Lappeenranta, Finland.
authors.forename: Payman
authors.initials: P
authors.lastname: Jalali
authors.forename: Mo
authors.initials: M
authors.lastname: Li
authors.forename: Jouni
authors.initials: J
authors.lastname: Ritvanen
authors.forename: Pertti
authors.initials: P
authors.lastname: Sarkomaa
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004735:Energy Transfer; D017276:Friction; D015233:Models, Statistical; D009038:Motion; D017711:Nonlinear Dynamics; D010316:Particle Size; D012212:Rheology / Q000379:methods*; D012399:Rotation; D012680:Sensitivity and Specificity; D033081:Shear Strength; D013314:Stress, Mechanical; D013535:Suspensions
chemical_list: D013535:Suspensions