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Compaction And Density Fluctuations In Vibrated Granular Media

Author

Listed:
  • A. C. B. BARNUM

    (Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA)

  • ARIF OZBAY

    (Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA)

  • E. R. NOWAK

    (Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA)

Abstract

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.

Suggested Citation

  • A. C. B. Barnum & Arif Ozbay & E. R. Nowak, 2001. "Compaction And Density Fluctuations In Vibrated Granular Media," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 4(04), pages 389-396.
    • Handle: RePEc:wsi:acsxxx:v:04:y:2001:i:04:n:s0219525901000243
    DOI: 10.1142/S0219525901000243
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