Asymptotic velocity distribution of a driven one dimensional binary granular Maxwell gas
| Autor: | Apurba Biswas, V. V. Prasad, R. Rajesh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Statistics and Probability
Physics Steady state Statistical Mechanics (cond-mat.stat-mech) Mathematical analysis Scalar (physics) FOS: Physical sciences Statistical and Nonlinear Physics Dissipation 01 natural sciences 010305 fluids & plasmas Exponential function Distribution (mathematics) 0103 physical sciences Dissipative system Range (statistics) Statistics Probability and Uncertainty 010306 general physics Noise (radio) Condensed Matter - Statistical Mechanics |
| Popis: | We consider the steady states of a driven inelastic Maxwell gas consisting of two types of particles with scalar velocities. Motivated by experiments on bilayers where only one layer is driven, we focus on the case when only one of the two types of particles are driven externally, with the other species receiving energy only through inter-particle collision. The velocity $v$ of a particle that is driven is modified to $-r_w v+\eta$, where $r_w$ parameterises the dissipation upon the driving and the noise $\eta$ is taken from a fixed distribution. We characterize the statistics for small velocities by computing exactly the mean energies of the two species, based on the simplifying feature that the correlation functions are seen to form a closed set of equations. The asymptotic behaviour of the velocity distribution for large speeds is determined for both components through a combination of exact analysis for a range of parameters or obtained numerically to a high degree of accuracy from an analysis of the large moments of velocity. We show that the tails of the velocity distribution for both types of particles have similar behaviour, even though they are driven differently. For dissipative driving ($r_w Comment: 24 pages, 7 figures |
| Databáze: | OpenAIRE |
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