Particle dynamics in a dense vibrated fluidized bed as revealed by diffusing wave spectroscopy

V. Zivkovic, M. J. Biggs, D. H. Glass, P. Pagliai, A. Buts

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We report granular temperature data and long-time dynamics of mono-disperse glass particles in a three-dimensional dense bed subject to vertical sinusoidal vibrations over a wide range of conditions. The granular temperature of the particles was found to scale with the square of the peak vibrational velocity. The mean time of flight between the collisions was found to scale with the inverse of the square of the peak vibrational velocity, whilst the mean free path of the particles was observed to scale with the inverse of this velocity. The movement of the particles throughout the bed, which was observed to be sub-diffusive over macroscopic timescales for all conditions considered here, appears to be governed by collective motion of particles between cavities defined by their neighbours.

Original languageEnglish
Pages (from-to)192-201
Number of pages10
JournalPowder Technology
Volume182
Issue number2
DOIs
Publication statusPublished - 22 Feb 2008

Keywords

  • Caged dynamics
  • Glassy dynamics
  • Granular temperature
  • Jamming
  • Sub-diffusive
  • Vibro-fluidized bed

ASJC Scopus subject areas

  • Chemical Engineering(all)

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