A hybrid model for a single granular particle driven by a non-Gaussian viscous bath

作者：Combs K; Ball B; Olafsen J S^*

来源：Granular Matter, 2015, 17(4): 523-529.

DOI：10.1007/s10035-015-0573-1

• Non-equilibrium systems
• Granular gases
• Simulation

We report the results of a novel simulation for a single particle driven by a constructed distribution of non-Gaussian fluctuations. At each time step of the simulation, a pre-assembled look-up table of non-Gaussian fluctuations is used to "kick" the mobile tracer particle in a random direction in a 2D plane. The interaction between the bath and the tracer also includes a velocity-dependent viscous term that dissipates a portion of the energy gained in each kick of the particle. This simple code is used to explore the recent experimental and numerical results that demonstrate a tendency for non-equilibrium systems to recapture Gaussian statistics for the motion of the tracer particle and has only one adjustable parameter: a velocity-independent dissipation constant.

• 出版日期2015-8