Volume 80, Number 1, October 2007
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||12 September 2007|
Evaporation transition in vibro-fluidized granular matter
Experimental Physics, Saarland University - D-66123, Saarbücken, Germany
2 Centro Atómico Bariloche, Instituto Balseiro, CONICET - 8400, Bariloche, Argentina
3 The Abdus Salam ICTP - 34014 Trieste, Italy
Accepted: 17 August 2007
Using laser facility, we investigate the speed distribution in the gas phase of a vibrated 3D granular matter bed. Invoking a volume-exclusion principle in a dissipative theory we present a kinetic model to explain the non-Maxwellian distribution, the mean free path and its associated granular-matter global temperature. We reveal that the fluidized gap is a lattice-gas with a constant packing factor.
PACS: 45.70.-n – Granular systems / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© Europhysics Letters Association, 2007
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