'Flow & Jam' of frictional athermal systems under shear stress
Abstract
We report recent results of molecular dynamics simulations of frictional athermal particles at constant volume fraction and constant applied shear stress, focusing on a range of control parameters where the system first flows, but then jams after a time tjam. On decreasing the volume fraction, the mean jamming time diverges, while its sample fluctuations become so large that the jamming time probability distribution P(tjam) becomes a power-law. We obtain an insight on the origin of this phenomenology focusing on the flowing regime, which is characterized by the presence of a clear correlation between the shear velocity and the mean number of contacts per particles Z, whereby small velocities occur when Z acquires higher values.
Keywords
Cite
@article{arxiv.1202.4645,
title = {'Flow & Jam' of frictional athermal systems under shear stress},
author = {Raffaele Pastore and Massimo Pica Ciamarra and Antonio Coniglio},
journal= {arXiv preprint arXiv:1202.4645},
year = {2012}
}
Comments
10 pages, 7 figures