Role of defects in the onset of wall-induced granular convection.

Journal Article (Journal Article)

We investigate the onset of wall-induced convection in vertically vibrated granular matter by means of experiments and two-dimensional computer simulations. In both simulations and experiments we find that the wall-induced convection occurs inside the bouncing bed region of the parameter space, in which the granular bed behaves like a bouncing ball. A good agreement between experiments and simulations is found for the peak vibration acceleration at which convection starts. By comparing the results of simulations initialized with and without defects, we find that the onset of convection occurs at lower vibration strengths in the presence of defects. Furthermore, we find that the convection of granular particles initialized in a perfect hexagonal lattice is related to the nucleation of defects and the process is described by an Arrhenius law.

Full Text

Duke Authors

Cited Authors

  • Fortini, A; Huang, K

Published Date

  • March 27, 2015

Published In

Volume / Issue

  • 91 / 3

Start / End Page

  • 032206 -

PubMed ID

  • 25871102

Electronic International Standard Serial Number (EISSN)

  • 1550-2376

International Standard Serial Number (ISSN)

  • 1539-3755

Digital Object Identifier (DOI)

  • 10.1103/physreve.91.032206

Language

  • eng