Artículo
Self-diffusion in a quasi-two-dimensional gas of hard spheres
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 | 2020 |
Fecha de depósito | 2021-01-26 |
Publicado en |
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Resumen | A quasi-two-dimensional system of hard spheres strongly confined between two parallel plates is considered. The attention is focused on the macroscopic self-diffusion process observed when the system is seen from above or ... A quasi-two-dimensional system of hard spheres strongly confined between two parallel plates is considered. The attention is focused on the macroscopic self-diffusion process observed when the system is seen from above or from below. The transport equation, and the associated self-diffusion coefficient, are derived from a Boltzmann-Lorentz kinetic equation, valid in the dilute limit. Since the equilibrium state of the system is inhomogeneous, this requires the use of a modified Chapman-Enskog expansion that distinguishes between equilibrium and nonequilibrium gradients of the density of labeled particles. The self-diffusion coefficient is obtained as a function of the separation between the two confining plates. The theoretical predictions are compared with molecular dynamics simulation results and a good agreement is found. |
Identificador del proyecto | FIS2017-87117-P |
Cita | Brey Abalo, J.J., García de Soria Lucena, M.I. y Maynar Blanco, P. (2020). Self-diffusion in a quasi-two-dimensional gas of hard spheres. Physical Review E, 101 (1), 012102. |
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