Intermittency of energy in rapid granular shear flows.
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.
Jalali
Payman
P
Department of Energy Technology, Lappeenranta University of Technology, P.O. Box 20, 53851-Lappeenranta, Finland.
Li
Mo
M
Ritvanen
Jouni
J
Sarkomaa
Pertti
P
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
D013535:Suspensions