Coefficient of Restitution as a Fluctuating Quantity

Details Coefficient of Restitution as a Fluctuating Quantity Coefficient of Restitution as a Fluctuating Quantity

2011-03-31

arxiv.org/abs/1104.0049v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

The coefficient of restitution of a spherical particle in contact with a flat plate is investigated as a function of the impact velocity. As an experimental observation we notice non-trivial (non-Gaussian) fluctuations of the measured values. For a fixed impact velocity, the probability density of the coefficient of restitution, $p(\epsilon)$, is formed by two exponential functions (one increasing, one decreasing) of different slope. This behavior may be explained by a certain roughness of the particle which leads to energy transfer between the linear and rotational degrees of freedom.

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