Ponencia
Fluctuations of a piston on top of a fluidized granular gas
Autor/es | Brey Abalo, José Javier
Ruiz Montero, María José |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2009 |
Fecha de depósito | 2020-09-11 |
Publicado en |
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ISBN/ISSN | 978-0-7354-0624-7 0094-243X (impreso) 1551-7616 (electrónico) |
Resumen | A fluidized granular gas in presence of a gravitational field is considered. It is enclosed in a box with a movable piston on the top. Molecular dynamics simulation results show that, if the box is not too wide, the system ... A fluidized granular gas in presence of a gravitational field is considered. It is enclosed in a box with a movable piston on the top. Molecular dynamics simulation results show that, if the box is not too wide, the system reaches a stationary state with gradients only in the direction of the field. Here, attention is focussed on the velocity fluctuations of the piston, that are observed to be Gaussian. The relationship between the second moment of this distribution and the granular temperature of the gas just below it is investigated. The ratio between the mean square velocities of the pisto and the gas can be larger or smaller than unity depending on the parameters of the system. A kinetic theory is formulated and its predictions compared with the simulation data. |
Agencias financiadoras | Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | FIS2008-01339 |
Cita | Brey Abalo, J.J. y Ruiz Montero, M.J. (2009). Fluctuations of a piston on top of a fluidized granular gas. En 10th Granada Lectures on Modeling and Simulation of New Materials (109-123), Granada, (España): American Institute of Physics. |
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