scholarly journals Flow of granular materials down an inclined plane

1993 ◽  
Author(s):  
R. Gudhe ◽  
K.R. Rajagopal ◽  
M. Massoudi ◽  
R. Chi
Keyword(s):  
Granular Materials ◽  
Inclined Plane

Fully developed flow of granular materials down a heated inclined plane

1994 ◽  
Vol 103 (1-4) ◽  
pp. 63-78 ◽  
Author(s):  
R. Gudhe ◽  
K. R. Rajagopal ◽  
M. Massoudi
Keyword(s):  
Granular Materials ◽  
Inclined Plane ◽  
Fully Developed Flow

scholarly journals Insights into the rheology of cohesive granular media

2020 ◽  
Vol 117 (15) ◽  
pp. 8366-8373 ◽  
Author(s):  
Sandip Mandal ◽  
Maxime Nicolas ◽  
Olivier Pouliquen
Keyword(s):  
Numerical Simulations ◽  
Granular Materials ◽  
Significant Role ◽  
Granular Media ◽  
Adhesive Force ◽  
Flow Dynamics ◽  
Main Difficulty ◽  
Inclined Plane ◽  
New Approaches ◽  
Adhesive Forces

Characterization and prediction of the “flowability” of powders are of paramount importance in many industries. However, our understanding of the flow of powders like cement or flour is sparse compared to the flow of coarse, granular media like sand. The main difficulty arises because of the presence of adhesive forces between the grains, preventing smooth and continuous flows. Several tests are used in industrial contexts to probe and quantify the “flowability” of powders. However, they remain empirical and would benefit from a detailed study of the physics controlling flow dynamics. Here, we attempt to fill the gap by performing intensive discrete numerical simulations of cohesive grains flowing down an inclined plane. We show that, contrary to what is commonly perceived, the cohesive nature of the flow is not entirely controlled by the interparticle adhesion, but that stiffness and inelasticity of the grains also play a significant role. For the same adhesion, stiffer and less dissipative grains yield a less cohesive flow. This observation is rationalized by introducing the concept of a dynamic, “effective” adhesive force, a single parameter, which combines the effects of adhesion, elasticity, and dissipation. Based on this concept, a rheological description of the flow is proposed for the cohesive grains. Our results elucidate the physics controlling the flow of cohesive granular materials, which may help in designing new approaches to characterize the “flowability” of powders.

scholarly journals Chute Flows of Granular Material: Some Computer Simulations

1985 ◽  
Vol 52 (1) ◽  
pp. 172-178 ◽  
Author(s):  
C. S. Campbell ◽  
C. E. Brennen
Keyword(s):  
Computer Simulation ◽  
Kinetic Energy ◽  
Granular Materials ◽  
Granular Temperature ◽  
Two Dimensional ◽  
Field Quantity ◽  
Inclined Plane ◽  
Two Dimensional Flow ◽  
Random Motions ◽  
Theoretical Analyses

A computer simulation has been developed to describe unidirectional flows of granular materials. Results are presented for a simulation of the two-dimensional flow of disks or cylinders down an inclined plane or chute. Velocity and solid fraction profiles were measured from the simulated systems and compared with theoretical analyses and are compared with the limited experimental results now available. The behavior is shown to be critically dependent on a third field quantity—the “granular temperature”—a measure of the kinetic energy contained in the random motions of the particles.

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