# The Origin of a Repose Angle: Kinetics of Rearrangements for Granular Materials

Source: [The Origin of a Repose Angle: Kinetics of Rearrangements for Granular Materials](<https://www.sota2.com/research/paper/68fa25592c2a3760193af40b>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T10:38:53.977Z

Authors: Anael Lemaitre

Published: 2001-07-20T01:44:52.000Z

## Abstract

A microstructural theory of dense granular materials is presented, based on two main ideas. Firstly, that macroscopic shear results form activated local rearrangements at a mesoscopic scale. Secondly, that the update frequency of microscopic processes is determined by granular temperature. In a shear cell, the resulting constitutive equations account for Bagnold's scaling and for the existence of a Coulomb criterion of yield. In the case of a granular flow down an inclined plane, they account for the rheology observed in recent experiments and for the temperature and velocity profiles measured numerically.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0107422>)

[PDF](<https://arxiv.org/pdf/cond-mat/0107422.pdf>)