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Power law in the angular velocity distribution of a granular needle

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Published 22 February 2006 2006 EDP Sciences
, , Citation J. Piasecki and P. Viot 2006 EPL 74 1 DOI 10.1209/epl/i2005-10502-7

0295-5075/74/1/1

Abstract

We show how inelastic collisions induce a power law with exponent -3 in the decay of the angular velocity distribution of anisotropic particles with sufficiently small moment of inertia. We investigate this question within the Boltzmann kinetic theory for an elongated granular particle immersed in a bath. The power law persists so long as the collisions are inelastic for a large range of angular velocities provided the mass ratio of the anisotropic particle and the bath particles remains small. Suggestions for observing this peculiar feature are made.

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10.1209/epl/i2005-10502-7