论文标题
通过控制驱动的粒状气体实验中的碰撞速率来调整与电气的距离
Tuning the distance to the equipartition by controlling the collision rate in a driven granular gas experiment
论文作者
论文摘要
在限制在薄层中的磁化颗粒的颗粒气体实验中，通过调节外部磁场的幅度来调整耗散碰撞的速率。使用横向速度模式的动态和静态结构因子分析速度统计。使用波动的流体动力学理论，我们测量了该平衡系统中与动力学的偏差，这是耗散碰撞速率的函数。当碰撞速率降低时，均衡的距离变为较小的，这意味着这种颗粒气的动力学特性通过热平衡中分子气的动力学方法类比。
In a granular gas experiment of magnetized particles confined in a thin layer, the rate of dissipative collisions is tuned by adjusting the amplitude of an external magnetic field. The velocity statistics are analyzed using the dynamic and static structure factors of transverse velocity modes. Using the fluctuating hydrodynamics theory we measure the deviation from kinetic energy equipartition in this out-of-equilibrium system as a function of the dissipative collision rate. When the collision rate is decreased, the distance to equipartition becomes smaller meaning that the dynamical properties of this granular gas approach by analogy those of a molecular gas in thermal equilibrium.
