Negative coefficient of normal restitution

Müller P, Krengel D, Pöschel T (2012)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2012

Journal

Physical Review E American Physical Society

Publisher: American Physical Society

Book Volume: 85

Article Number: 041306

Journal Issue: 4

DOI: 10.1103/PhysRevE.85.041306

Abstract

This paper shows that negative coefficients of normal restitution occur inevitably when the interaction force between colliding particles is finite. We derive an explicit criterion showing that for any set of material properties there is always a collision geometry leading to negative restitution coefficients. While from a phenomenological point of view, negative coefficients of normal restitution appear rather artificial, this phenomenon is generic and implies an important overlooked limitation of the widely used hard sphere model. The criterion is explicitly applied to two paradigmatic situations: for the linear dashpot model and for viscoelastic particles. In addition, we show that for frictional particles the phenomenon is less pronounced than for smooth spheres. © 2012 American Physical Society.

Authors with CRIS profile

Patric Müller Lehrstuhl für Multiscale Simulation of Particulate Systems Thorsten Pöschel Lehrstuhl für Multiscale Simulation of Particulate Systems

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

How to cite

APA:

Müller, P., Krengel, D., & Pöschel, T. (2012). Negative coefficient of normal restitution. Physical Review E, 85(4). https://dx.doi.org/10.1103/PhysRevE.85.041306

MLA:

Müller, Patric, Dominik Krengel, and Thorsten Pöschel. "Negative coefficient of normal restitution." Physical Review E 85.4 (2012).

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