Artículo
Breakdown of the fluctuation-dissipation relations in granular gases
Autor/es | Brey Abalo, José Javier
García de Soria Lucena, María Isabel Maynar Blanco, Pablo |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2008-10 |
Fecha de depósito | 2017-07-17 |
Publicado en |
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Resumen | A numerical molecular dynamics experiment measuring the two-time correlation function of the transversal velocity field in the homogeneous cooling state of a granular gas modeled as an ensemble of inelastic hard particles ... A numerical molecular dynamics experiment measuring the two-time correlation function of the transversal velocity field in the homogeneous cooling state of a granular gas modeled as an ensemble of inelastic hard particles is reported. By measuring the decay rate and the amplitude of the correlations, the accuracy of the Landau-Langevin equation of fluctuating hydrodynamics is checked. The results indicate that although a Langevin approach can be valid, the fluctuation-dissipation relation must be modified, since the viscosity parameter appearing in it differs from the usual hydrodynamic shear viscosity. |
Agencias financiadoras | Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | FIS2008-01339
RII3-CT- 2003-506079 |
Cita | Brey Abalo, J.J., García de Soria Lucena, M.I. y Maynar Blanco, P. (2008). Breakdown of the fluctuation-dissipation relations in granular gases. Europhysics Letters, 84 (2), 24002-p1-24002-p5. |
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