Artículo
Transport coefficients for dense hard-disk systems
Autor/es | García Rojo, Ramón
Brey Abalo, José Javier |
Departamento | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Fecha de publicación | 2006 |
Fecha de depósito | 2020-06-01 |
Publicado en |
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Resumen | A study of the transport coefficients of a system of elastic hard disks based on the use of Helfand-Einstein expressions is reported. The self-diffusion, the viscosity, and the heat conductivity are examined with averaging ... A study of the transport coefficients of a system of elastic hard disks based on the use of Helfand-Einstein expressions is reported. The self-diffusion, the viscosity, and the heat conductivity are examined with averaging techniques especially appropriate for event-driven molecular dynamics algorithms with periodic boundary conditions. The density and size dependence of the results are analyzed, and comparison with the predictions from Enskog’s theory is carried out. In particular, the behavior of the transport coefficients in the vicinity of the fluid-solid transition is investigated and a striking power law divergence of the viscosity with density is obtained in this region, while all other examined transport coefficients show a drop in that density range in relation to the Enskog’s prediction. Finally, the deviations are related to shear band instabilities and the concept of dilatancy. |
Agencias financiadoras | Ministerio de Educación y Ciencia (MEC). España |
Identificador del proyecto | Grant No. FIS2005- 01398 |
Cita | García Rojo, R. y Brey Abalo, J.J. (2006). Transport coefficients for dense hard-disk systems. Physical Review E, 74 (6), 061305-1-061305-11. |
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pub1PhysRevE.74.061305.pdf | 183.0Kb | [PDF] | Ver/ | |