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APS » Journals » Phys. Rev. E » Volume 76 » Issue 5
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Phys. Rev. E 76, 051302 (2007) [12 pages]

Collision dynamics of granular particles with adhesion

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Nikolai V. Brilliantov
Institute of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany and Department of Physics, Moscow State University, Vorobievy Gory 1, 119899 Moscow, Russia

Nicole Albers
Laboratory for Atmospheric and Space Science, University of Colorado at Boulder, 392 UCB, Boulder, Colorado 80303, USA

Frank Spahn
Institute of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany

Thorsten Pöschel
Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth, Germany

Received 25 April 2007; published 7 November 2007

We investigate the collision of adhesive viscoelastic spheres in quasistatic approximation where the adhesive interaction is described by the Johnson, Kendall, and Roberts (JKR) theory. The collision dynamics, based on the dynamic contact force, describes both restitutive collisions quantified by the coefficient of restitution ε as well as aggregative collisions, characterized by the critical aggregative impact velocity gcr. Both quantities ε and gcr depend sensitively on the impact velocity and particle size. Our results agree well with laboratory experiments.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.76.051302
DOI:
10.1103/PhysRevE.76.051302
PACS:
45.70.Vn, 45.50.Tn, 46.05.+b
 
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