Plug flow and the breakdown of Bagnold scaling in cohesive granular flows
arXiv:cond-mat/0509122 · doi:10.1103/PhysRevE.72.061301
Abstract
Cohesive granular media flowing down an inclined plane are studied by discrete element simulations. Previous work on cohesionless granular media demonstrated that within the steady flow regime where gravitational energy is balanced by dissipation arising from intergrain forces, the velocity profile in the flow direction scales with depth in a manner consistent with the predictions of Bagnold. Here we demonstrate that this Bagnold scaling does not hold for the analogous steady-flows in cohesive granular media. We develop a generalization of the Bagnold constitutive relation to account for our observation and speculate as to the underlying physical mechanisms responsible for the different constitutive laws for cohesive and noncohesive granular media.
arXiv comment8 pages, 10 figures
References in corpus (7)
- Granular flow down an inclined plane: Bagnold scaling and rheology
- Particle dynamics in sheared granular matter
- Granular Shear Flow Dynamics and Forces : Experiment and Continuum Theory
- Granular flow down a rough inclined plane: transition between thin and thick piles
- Velocity correlations in dense granular flows
- Granular gravitational collapse and chute flow
- A Hydrodynamic model for a dynamical jammed-to-flowing transition in gravity driven granular media
Cited by in corpus (10)
- Computer simulation of model cohesive powders: influence of assembling procedure and contact laws on low consolidation states
- Rheological properties of dense granular flows
- Flow of wet granular materials: a numerical study
- Computer simulation of model cohesive powders: Plastic consolidation, structural changes and elasticity under isotropic loads
- Rheology and Contact Lifetime Distribution in Dense Granular Flows
- Long Range Correlations in Granular Shear Flow I: Numerical Evidence
- Lubrication effects on the flow of wet granular materials
- Deformation-Driven Diffusion and Plastic Flow in Two-Dimensional Amorphous Granular Pillars
- Simple Model for Wet Granular Materials with Liquid Clusters
- Unsaturated wet granular flows over a rough incline: frictional and cohesive rheology