Article
Rheological effects in the linear response and spontaneous fluctuations of a sheared granular gas
Author/s | Brey Abalo, José Javier
Maynar Blanco, Pablo García de Soria Lucena, María Isabel |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2012 |
Deposit Date | 2020-05-19 |
Published in |
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Abstract | The decay of a small homogeneous perturbation in the temperature of a dilute granular gas in the steady
uniform shear flow state is investigated. Using kinetic theory based on the inelastic Boltzmann equation, a ... The decay of a small homogeneous perturbation in the temperature of a dilute granular gas in the steady uniform shear flow state is investigated. Using kinetic theory based on the inelastic Boltzmann equation, a closed equation for the decay of the perturbation is derived. The equation involves the generalized shear viscosity of the gas in the time-dependent shear flow state, and therefore, it predicts relevant rheological effects beyond the quasielastic limit. Good agreement is found when comparing the theory with molecular dynamics simulation results. Moreover, the Onsager postulate on the regression of fluctuations is fulfilled |
Funding agencies | Ministerio de Educación y Ciencia (MEC). España |
Project ID. | Grant No. FIS2011-24460 |
Citation | Brey Abalo, J.J., Maynar Blanco, P. y García de Soria Lucena, M.I. (2012). Rheological effects in the linear response and spontaneous fluctuations of a sheared granular gas. Physical Review E, 86 (6), 061308-1-061308-5. |
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pubPhysRevE.86.061308.pdf | 129.9Kb | [PDF] | View/ | |