English, Article edition: COMPACTION AND DENSITY FLUCTUATIONS IN VIBRATED GRANULAR MEDIA A. C. B. BARNUM; ARIF OZBAY; E. R. NOWAK

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Physical Description
  • article
Language
  • English

Edition details

Title
  • COMPACTION AND DENSITY FLUCTUATIONS IN VIBRATED GRANULAR MEDIA
Author
  • A. C. B. BARNUM
  • ARIF OZBAY
  • E. R. NOWAK
Physical Description
  • article
Notes
  • We report measurements of the density of a vibrated granular material as a function of time or taps. The material studied consists of monodisperse spherical glass beads confined to a long, thin cylindrical tube. Changes in vibration intensity are used to induce transitions between two steady state densities that depend on the intensity of the vibrations. We find a complex time evolution similar to previous work on the irreversible relaxation from a loose state toward a steady state. In addition, frequency dependent third order moments of the density fluctuations are measured. The data indicate a coupling between large variations in density on one time scale and noise power over a broad range of higher-frequency scales.
  • Granular compaction, packing, noise, nonlinear dynamics, nonequilibrium thermodynamics
  • RePEc:wsi:acsxxx:v:04:y:2001:i:04:p:389-396
Language
  • English
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