Application of 2DMD to gaseous microflows

被引：13

作者：

Cao, BY ^{[1
]}

Chen, M ^{[1
]}

Guo, ZY ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

来源：

CHINESE SCIENCE BULLETIN | 2004年 / 49卷 / 11期

基金：

中国国家自然科学基金;

关键词：

molecular dynamics; 2D system; microscale now; rarefaction effect;

D O I：

10.1360/03ww0203

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 [理学]; 0710 [生物学]; 09 [农学];

摘要：

A two-dimensional molecular dynamics (2DMD) simulation is applied to gaseous microflows. Based on a velocity distribution function in equilibrium, the mean molecular speed, mean collision frequency, mean free path, and the dynamical viscosity are deduced theoretically. A Maxwell-type-like boundary condition for two-dimensional (2D) systems, which reveals a linear relationship between the slip length and the mean free path, is also derived. These expressions are consequently employed to investigate the rarefied gas flow in a submicron channel. The results show reasonable agreements with those by 3D simulations, and indicate that the 2DMD scheme can be very promising for the microflow researches because of its high efficiency in computation.

引用

页码：1101 / 1105

页数：5

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