Compaction Dynamics of Wet Granular Assemblies

J. E. Fiscina, G. Lumay, F. Ludewig, and N. Vandewalle
Phys. Rev. Lett. 105, 048001 – Published 19 July 2010

Abstract

The extremely slow compaction dynamics of wet granular assemblies is studied experimentally. The cohesion, due to capillary bridges between neighboring grains, is tuned using different liquids having specific surface tension values. The compaction dynamics of a cohesive packing obeys an inverse logarithmic law, like most dry random packings. However, the characteristic relaxation time τ grows strongly with cohesion. A model, based on free volume kinetic equations and the presence of a capillary energy barrier, is able to reproduce quantitatively the experimental curves.

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  • Received 3 December 2009

DOI:https://doi.org/10.1103/PhysRevLett.105.048001

©2010 American Physical Society

Authors & Affiliations

J. E. Fiscina1,2,*, G. Lumay1, F. Ludewig1, and N. Vandewalle1

  • 1GRASP, Physics Department B5, University of Liège–B-4000 Liège, Belgium
  • 2Experimental Physics, Saarland University, D-66123, Saarbrücken Germany

  • *j.fiscina@mx.uni-saarland.de

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Vol. 105, Iss. 4 — 23 July 2010

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