Coefficient of tangential restitution for viscoelastic spheres
Schwager T, Becker V, Pöschel T (2008)
Publication Language: English
Publication Type: Journal article
Publication year: 2008
Journal
Publisher: EDP Sciences: EPJ
Book Volume: 27
Pages Range: 107--114
Journal Issue: 1
DOI: 10.1140/epje/i2007-10356-3
Abstract
The collision of frictional granular particles may be described by an interaction force whose normal component is that of viscoelastic spheres while the tangential part is described by the model by Cundall and Strack (G´ eotechnique 29, 47 (1979)) being the most popular tangential collision model in Molecular Dynamics simulations. Albeit being a rather complicatedmodel, governed by 5 phenomenological parameters and 2 independent initial conditions, we find that it is described by 3 independent parameters only. Surprisingly, in a wide range of parameters the corresponding coefficient of tangential restitution, εt, is well described by the simple Coulomb law with a cut-off at εt = 0. A more complex behavior of the coefficient of restitution as a function on the normal and tangential components of the impact velocity, gn and gt, including negative values of εt, is found only for very small ratio gt/gn. For the analysis presented here we neglect dissipation of the interaction in normal direction.
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APA:
Schwager, T., Becker, V., & Pöschel, T. (2008). Coefficient of tangential restitution for viscoelastic spheres. European Physical Journal E, 27(1), 107--114. https://doi.org/10.1140/epje/i2007-10356-3
MLA:
Schwager, Thomas, Volker Becker, and Thorsten Pöschel. "Coefficient of tangential restitution for viscoelastic spheres." European Physical Journal E 27.1 (2008): 107--114.
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