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Energy partition and segregation for an intruder in a vibrated granular system under gravity

 

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Opened Access Energy partition and segregation for an intruder in a vibrated granular system under gravity
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Author: Brey Abalo, José Javier
Ruiz Montero, María José
Moreno, F.
Department: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2005-08-26
Published in: Physical Review Letters, 95 (9), 098001-1-098001-4.
Document type: Article
Abstract: The difference of temperatures between an impurity and the surrounding gas in an open vibrated granular system is studied. It is shown that, in spite of the high inhomogeneity of the state, the temperature ratio remains constant in the bulk of the system. The lack of energy equipartition is associated to the change of sign of the pressure diffusion coefficient for the impurity at certain values of the parameters of the system, leading to a segregation criterium. The theoretical predictions are consistent with previous experimental results, and also in agreement with molecular dynamics simulation results reported in this Letter.
Cite: Brey Abalo, J.J., Ruiz Montero, M.J. y Moreno, F. (2005). Energy partition and segregation for an intruder in a vibrated granular system under gravity. Physical Review Letters, 95 (9), 098001-1-098001-4.
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URI: http://hdl.handle.net/11441/62628

DOI: 10.1103/PhysRevLett.95.098001

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