Collision statistics in a dilute granular gas fluidized by vibrations in low gravity

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 c...

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Bibliographic Details
Published in:Europhysics letters 2006-06, Vol.74 (5), p.830-836
Main Authors: Falcon, E, Aumaître, S, Évesque, P, Palencia, F, Lecoutre-Chabot, C, Fauve, S, Beysens, D, Garrabos, Y
Format: Article
Language:English
Subjects:
45.50.-j
45.70.-n
81.70.Ha
Condensed Matter
Other
Physics
Soft Condensed Matter
Statistical Mechanics
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Summary: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).
ISSN:0295-5075
1286-4854
DOI:10.1209/epl/i2005-10589-8