The role of rotational inertia in the dynamics of vibrofluidised granular gases

C. R.K. Windows-Yule; B. Maddox; D. J. Parker

doi:10.1209/0295-5075/108/58006

The role of rotational inertia in the dynamics of vibrofluidised granular gases

C. R.K. Windows-Yule^*, B. Maddox, D. J. Parker

^*Corresponding author for this work

Research output: Contribution to journal › Letter › peer-review

6 Citations (Scopus)

Abstract

The effect of particle shape on the properties of granular systems is a matter of great relevance to many diverse fields, yet remains incompletely understood. While the geometry of a particle determines a number of its physical properties, in this study, we isolate the influence of the moment of inertia possessed by a particle on its dynamical behaviour. Through the application of positron emission particle tracking, we experimentally investigate vibrofluidised granulates comprising particles of varying rotational inertia. We demonstrate that beds composed of particles with greater rotational inertia consistently obtain higher translational kinetic energies than those comprising particles with lower angular mass. This observation is shown to be robust over a range of system parameters, and a mechanism explaining the newly observed behaviour is proposed.

Original language	English
Article number	58006
Number of pages	7
Journal	EPL
Volume	108
Issue number	5
DOIs	https://doi.org/10.1209/0295-5075/108/58006
Publication status	Published - 5 Dec 2014

ASJC Scopus subject areas

General Physics and Astronomy

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abstract = "The effect of particle shape on the properties of granular systems is a matter of great relevance to many diverse fields, yet remains incompletely understood. While the geometry of a particle determines a number of its physical properties, in this study, we isolate the influence of the moment of inertia possessed by a particle on its dynamical behaviour. Through the application of positron emission particle tracking, we experimentally investigate vibrofluidised granulates comprising particles of varying rotational inertia. We demonstrate that beds composed of particles with greater rotational inertia consistently obtain higher translational kinetic energies than those comprising particles with lower angular mass. This observation is shown to be robust over a range of system parameters, and a mechanism explaining the newly observed behaviour is proposed.",

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AB - The effect of particle shape on the properties of granular systems is a matter of great relevance to many diverse fields, yet remains incompletely understood. While the geometry of a particle determines a number of its physical properties, in this study, we isolate the influence of the moment of inertia possessed by a particle on its dynamical behaviour. Through the application of positron emission particle tracking, we experimentally investigate vibrofluidised granulates comprising particles of varying rotational inertia. We demonstrate that beds composed of particles with greater rotational inertia consistently obtain higher translational kinetic energies than those comprising particles with lower angular mass. This observation is shown to be robust over a range of system parameters, and a mechanism explaining the newly observed behaviour is proposed.

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The role of rotational inertia in the dynamics of vibrofluidised granular gases

Abstract

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