分子动力学
平均自由程
跳跃式监视
航程(航空)
路径(计算)
材料科学
分布(数学)
平面的
自由分子流
机械
统计物理学
物理
化学物理
电子
数学
量子力学
数学分析
复合材料
人工智能
程序设计语言
计算机图形学(图像)
计算机科学
作者
Nishanth Dongari,Yonghao Zhang,Jason M. Reese
标识
DOI:10.1088/0022-3727/44/12/125502
摘要
We present the results of investigations into the distribution of molecular free paths in rarefied gases using molecular dynamics simulations. Our tests on a range of different gas densities and confinements (unbounded, single bounding wall and parallel bounding walls) indicate that the molecules perform Lévy-type flights, irrespective of the presence of a bounding wall. The free paths most closely follow a power-law distribution. Simulations of gases confined by planar surfaces indicate that the local molecular mean free path varies sharply close to a solid surface. These results may yield new insight into diffusive transport in rarefied gases, in particular, the constitutive behaviour of gas flows in micro- and nanoscale devices.
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