Volume 74, Number 5, June 2006
|Page(s)||830 - 836|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||10 May 2006|
Collision statistics in a dilute granular gas fluidized by vibrations in low gravity
Laboratoire de Physique, ENS Lyon, UMR 5672 CNRS 46 allée d'Italie, 69007 Lyon, France
2 LPS, ENS Paris, UMR 8550 CNRS - 24 rue Lhomond, 75005 Paris, France
3 Laboratoire MSSMat, École Centrale Paris, UMR 8579 CNRS 92295 Chatenay-Malabry, France
4 ESEME-CEA-CNRS, ICMCB, 87 av. Schweitzer, Université Bordeaux 1 33608 Pessac Cedex, France
Corresponding author: Eric.Falcon@ens-lyon.fr
Accepted: 11 April 2006
We report an experimental study of a dilute “gas” of inelastically colliding particles excited by vibrations in low gravity. We show that recording the collision frequency together with the impulses on a wall of the container gives access to several quantities of interest. We observe that the mean collision frequency does not scale linearly with the number N of particles in the container. This is due to the dissipative nature of the collisions and is also directly related to the non-extensive behaviour of the kinetic energy (the granular temperature is not intensive).
PACS: 45.70.-n – Granular systems / 81.70.Ha – Testing in microgravity environments / 45.50.-j – Dynamics and kinematics of a particle and a system of particles
© EDP Sciences, 2006
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