Steady uniform shear flow in a low density granular gas
Steady uniform shear flow in a low density granular gas
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低密度颗粒气体中的稳定均匀剪切流
DOI：
10.1103/physreve.55.2846
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
F. Moreno
中科院分区：
文献类型：
--
作者：
J. Brey;M. Ruiz;F. Moreno
本文用动力学模型方程和Boltzmann方程的直接MonteCarlo模拟方法研究了低密度颗粒系统的稳态均匀剪切流动。前者可以精确求解任意剪切速率和耗散。得到了单粒子分布函数和压力张量的显式表达式。与以前的理论的结果的比较，在适当的限制。模拟结果表明，该模型相当好地再现了应力值，特别是法向应力差的现象。在热速度区的速度分布函数的一致性也很好，尽管在大速度区出现了显著的差异。S1063-651X~97！12803-3#
The steady uniform shear flow of a low density granular sytem is studied by means of a kinetic model equation and also by direct Monte Carlo simulation of the Boltzmann equation. The former can be exactly solved for arbitrary shear rate and dissipation. Explicit expressions for the one-particle distribution function and the pressure tensor are obtained. Comparison of the results with those of previous theories is presented in the appropriate limits. The simulation shows that the model reproduces fairly well the values of the stresses and, in particular, the phenomenon of normal stress differences. The agreement is also very good for the velocity distribution function in the thermal velocity region, although significant discrepancies appear for large velocities.@S1063-651X~97!12803-3#