加热机制对粒径呈幂律分布的颗粒气体中能量均分失效行为的影响

The effect of heating mechanism on nonequipartition behaviorin granular gases with a power-law size distribution

在粒径呈连续分布的颗粒气体系统内,不同组分的颗粒之间的颗粒温度不相等,即能量均分失效.我们采用分子动力学模拟研究边界加热机制对粒径呈幂律分布的颗粒气体中能量均分失效行为的影响.研究发现不仅仅是位于边界热源附近的颗粒,远离边界位于系统内部的、不同组分的颗粒从边界热源获取的能量差越大,系统的能量均分失效就越严重.边界加热机制决定了混合颗粒系统内部的能量均分失效程度的强弱.

Two-dimensional molecular dynamics simulations are employed to gain insight on the effect of the different heating mechanism in determining the extent of nonequipartition of kinetic energy in granu- lar gases with a power-law particle size distribution. It is found that the bulk value of the temperature ratio depends on the choice of different boundary heating.