Microstructure evolution in compacted granular beds

Anthony D. Rosato, Doris Yacoub

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

In this paper, the densification process experienced by a bed of frictional, inelastic spheres of diameter d in a rectangular vessel whose floor is subjected to high frequency (ω) and low amplitude (a/d ≠ 0.1) sinusoidal oscillations is modeled using discrete element simulations. Our recent experimental observations as well as those in the literature motivate this investigation. Beginning with an initial random assembly resulting from gravity deposition, the floor motion activates the system so as to induce the formation of a distinct microstructure in the absence of a mean flow field. This is accompanied by an increase in coordination number and bulk solids fraction whose evolution is strongly dependent on the magnitude of the acceleration amplitude Γ ≡ aω2/g. (C) 2000 Elsevier Science S.A.

Original languageEnglish (US)
Pages (from-to)255-261
Number of pages7
JournalPowder Technology
Volume109
Issue number1-3
DOIs
StatePublished - Apr 3 2000

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Keywords

  • Discrete element simulation
  • Granular materials
  • Microstructure
  • Vibration-induced densification

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