Journal ArticleDOI
Model for a stationary dense granular flow along an inclined wall
P. Mills,D. Loggia,M. Tixier +2 more
TLDR
In this paper, a new constitutive law relating the stress tensor to non-local functions of the velocity field and structural parameters of the material was proposed, which can be used to describe the diphasic behavior of granular medium under stress.Abstract:
The stationary dense granular flow along an inclined plane has been studied in the present work. Several experimental results of the velocity profile published previously can not be described using conventional constitutive laws of continuum mechanics. Considering recent results revealing the diphasic behavior of granular medium under stress, we propose a new constitutive law relating the stress tensor to non-local functions of the velocity field and structural parameters of the material.read more
Citations
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Journal ArticleDOI
On dense granular flows.
TL;DR: A quantitative comparison between data coming from different experiments in the same geometry identifies the robust features in each case and a transverse analysis of the data across the different configurations allows to identify the relevant dimensionless parameters, the different flow regimes and to propose simple interpretations.
Journal ArticleDOI
A constitutive law for dense granular flows
TL;DR: The results support the idea that a simple visco-plastic approach can quantitatively capture granular flow properties, and could serve as a basic tool for modelling more complex flows in geophysical or industrial applications.
Journal ArticleDOI
Rheophysics of dense granular materials: Discrete simulation of plane shear flows
TL;DR: From those dilatancy and friction laws, the constitutive law for dense granular flows is deduced, with a plastic Coulomb term and a viscous Bagnold term, for the limit of rigid grains.
Journal ArticleDOI
Flows of Dense Granular Media
Yoël Forterre,Olivier Pouliquen +1 more
TL;DR: In this article, the existence of a dense flow regime characterized by enduring contacts is discussed, and results from experiments and simulations in different configurations support a description in terms of a frictional visco-plastic constitutive law.
Journal ArticleDOI
The mobility of long-runout landslides
TL;DR: In this article, it was shown that the apparent coefficient of friction (ratio of the fall height to the runout distance) commonly used to describe landslide mobility is physically meaningless.
References
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Book
The Physics of Blown Sand and Desert Dunes
TL;DR: The physics of blown sand and desert dunes, The physics of windblown sand and sand dunes, this paper, and the physics of dunes in the Middle East and Africa.
Journal ArticleDOI
Bimodal Character of Stress Transmission in Granular Packings
TL;DR: In this article, the correlation between contact forces and the texture of a packing of rigid particles subject to biaxial compression is analyzed by means of numerical simulations, which provide evidence that the contact network can be decomposed unambiguously into two subnetworks with complementary mechanical properties.
Journal ArticleDOI
Force Distributions in Dense Two-Dimensional Granular Systems
TL;DR: The ratio of friction to normal force is uniformly distributed and is uncorrelated with normal force, and when normalized with respect to their mean values, these distributions are independent of sample size and particle size distribution.
Journal ArticleDOI
Model for force fluctuations in bead packs.
Susan Coppersmith,Susan Coppersmith,Chu-heng Liu,Chu-heng Liu,Satya N. Majumdar,O. Narayan,O. Narayan,Thomas A. Witten +7 more
TL;DR: This model reproduces many aspects of the force distribution observed both in experiment and in numerical simulations of sphere packings, including exact results for certain contact angle probability distributions.