Artículo
Energy fluctuations in the homogeneous cooling state of granular gases
Autor/es | Brey Abalo, José Javier
García de Soria Lucena, María Isabel Maynar Blanco, Pablo Ruiz Montero, María José |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2004 |
Fecha de depósito | 2020-05-19 |
Publicado en |
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Resumen | Starting from the hierarchy of equations for microscopic densities in phase space, a general theory for
fluctuations and correlations in a dilute granular gas of hard particles is developed. Then, the particular case ... Starting from the hierarchy of equations for microscopic densities in phase space, a general theory for fluctuations and correlations in a dilute granular gas of hard particles is developed. Then, the particular case of the homogeneous cooling state is addressed. Explicit expressions for some distributions describing the presence of velocity correlations and their dynamics are obtained. These correlations are inherent to the dissipative dynamics of the collisions. The implications for the behavior of the total energy of the system are analyzed and the results are expressed in terms of a fluctuation-dissipation theorem. The theoretical predictions are shown to be in agreement with results obtained by molecular dynamics simulations, which also indicate that energy fluctuations are well described by a Gaussian distribution |
Cita | Brey Abalo, J.J., García de Soria Lucena, M.I., Maynar Blanco, P. y Ruiz Montero, M.J. (2004). Energy fluctuations in the homogeneous cooling state of granular gases. Physical Review E, 70 (1), 0 011302-1-0 011302-12. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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pubPhysRevE.70.011302.pdf | 133.2Kb | [PDF] | Ver/ | |