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The European Physical Journal E

, Volume 4, Issue 2, pp 233–239 | Cite as

Vertically shaken column of spheres. Onset of fluidization

  • S. Renard
  • T. Schwager
  • T. Pöschel
  • C. Salueña

Abstract:

The onset of surface fluidization of granular material in a vertically vibrated container, z = A cos\(\)ωt\(\), is studied experimentally. Recently, for a column of spheres it has been theoretically found (see T. Pöschel, T. Schwager, C. Salue na, Phys. Rev. E 62, 1361 (2000)) that the particles lose contact if a certain condition for the acceleration amplitude \(\)Aω2/g = f (ω) holds. This result is in disagreement with other findings where the criterion \(\) = \(\) = const was found to be the criterion of fluidization. We show that for a column of spheres a critical acceleration is not a proper criterion for fluidization and compare the results with theory.

PACS. 81.05.Rm Porous materials; granular materials – 83.70.Fn Granular solids 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2001

Authors and Affiliations

  • S. Renard
    • 1
  • T. Schwager
    • 1
  • T. Pöschel
    • 1
  • C. Salueña
    • 2
  1. 1.Humboldt-Universität, Charité, Institut für Biochemie, Monbijoustraße 2, D-10117 Berlin, GermanyDE
  2. 2.Humboldt-Universität, Institut für Physik, Invalidenstraße 110, D-10115 Berlin, GermanyDE

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