Article
Breakdown of the fluctuation-dissipation relations in granular gases
Author/s | Brey Abalo, José Javier
![]() ![]() ![]() ![]() ![]() ![]() ![]() García de Soria Lucena, María Isabel ![]() ![]() ![]() ![]() ![]() ![]() Maynar Blanco, Pablo ![]() ![]() ![]() ![]() ![]() ![]() |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2008-10 |
Deposit Date | 2017-07-17 |
Published in |
|
Abstract | 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. |
Funding agencies | Ministerio de Educación y Ciencia (MEC). España |
Project ID. | FIS2008-01339
![]() RII3-CT- 2003-506079 ![]() |
Citation | 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. |
Files | Size | Format | View | Description |
---|---|---|---|---|
Breakdown of the fluctuation-d ... | 169.6Kb | ![]() | View/ | |