The liquid and solid states of highly dissipative vibrated granular columns: One-dimensional computer simulations

A. Alexeev, A. Goldshtein, M. Shapiro*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

One-dimensional arrangements of inelastically colliding spheres moving in a vertically oscillating vessel in the gravity field are investigated numerically. These arrangements are used to study the liquid and solid states of layers composed of granules with high energy dissipation properties. We found that the liquid state may be characterized by the kinetic energy of the particles' relative motion, Erel, and the particles' mean free path, λ. The layers' dissipative properties may be characterized by parameter D1 = N(1-e1) where N is the particle number, e1 the particles' restitution coefficient measured for a binary particle collision with a fixed relative velocity. For highly dissipative layers, i.e., those with D1 > 3, maximal value of Erel is found to be independent of D1, proportional to the square of vibrational amplitude and frequency, and inversely proportional to N2/3. The mean free path λ is found to have minimum when D1 is about 3 and increases when D1 > 3. This occurs because of the layer's interchangeable transitions between two granular states: liquid and solid. The vibrational regimes, where in spite of extensive vibrations, the layer prevails in the solid state, were investigated. A stability criterion of the solid state was derived in terms of a critical vibrational amplitude. This critical amplitude is independent of the layers' dissipative properties and proportional to N5/3. The results of the simulation are compared with the experimental data obtained for 2-D vibrated granular layers.

Original languageEnglish
Pages (from-to)83-104
Number of pages22
JournalPowder Technology
Volume123
Issue number1
DOIs
StatePublished - 18 Feb 2002
Externally publishedYes

Keywords

  • Liquid state
  • Simulations
  • Solid state
  • Vibrated granular columns

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