Numerical simulation of 2D steady granular flows in rotating drum: On surface flows rheology
arXiv:cond-mat/0506796 · doi:10.1063/1.2063347
Abstract
The rheology of 2D steady surface flow of cohesionless cylinders in a rotating drum is investigated through {\em Non Smooth Contact Dynamics} simulations. Profile of volume fraction, translational and angular velocity, rms velocity, strain rate and stress tensor were measured at the midpoint along the length of the surface flowing layer where the flow is generally considered as steady and homogeneous. Analysis of these data and their inter-relations suggest the local inertial number - defined as the ratio between local inertial forces and local confinement forces - to be the relevant dimensionless parameter to describe the transition from the quasi-static part of the packing to the flowing part at the surface of the heap. Variations of the components of the stress tensor as well as the ones of rms velocity as a function of the inertial number are analysed within both the quasi-static and the flowing phases. Their implications are discussed.
13 pages, 14 figures, 61 references, submitted to Phys. Fluids
References in corpus (14)
- On dense granular flows
- Granular flow down an inclined plane: Bagnold scaling and rheology
- Crucial role of side walls for granular surface flows: consequences for the rheology
- Creep motion in a granular pile exhibiting steady surface flow
- Granular Shear Flow Dynamics and Forces : Experiment and Continuum Theory
- Continuum theory of partially fluidized granular flows
- Experimental study of granular surface flows via a fast camera: a continuous description
- The Origin of a Repose Angle: Kinetics of Rearrangements for Granular Materials
- Multi-scale clustering in granular surface flows
- Stationary shear flows of dense granular materials : a tentative continuum modelling
- Solid-fluid transition in a granular shear flow
- Thick surface flows of granular materials: The effect of the velocity profile on the avalanche amplitude
- Diphasic non-local model for granular surface flows
- A self-similar model for shear flows in dense granular materials
Cited by in corpus (7)
- Rheology of surface granular flows
- Granular Flows in a Rotating Drum: the Scaling Law between Velocity and Thickness of the Flow
- Scaling Laws for the Slip Velocity in Dense Granular Flows
- Relevance of visco-plastic theory in a multi-directional inhomogeneous granular flow
- Euler-like modelling of dense granular flows: application to a rotating drum
- Friction and the oscillatory motion of granular flows
- Scaling laws for velocity profile of granular flow in rotating drums