Improved modified Reynolds equation for thin-film gas lubrication from an extended slip velocity boundary condition

被引：1
作者：
Qin Yang
Haijun Zhang
Yulu Liu
机构：
[1] Shanghai Univesity,Shanghai Institute of Applied Mathematics and Mechanics
[2] Jiaxing University,College of Mechanical and Electrical Engineering
来源：
Microsystem Technologies | 2016年 / 22卷
关键词：
Pitch Angle; Knudsen Number; Moment Equation; Direct Simulation Monte Carlo; Linearize Boltzmann Equation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An extended slip velocity boundary condition is derived from the regularized 13 moment equations firstly. Different from the existing slip velocity boundary condition, the slip coefficients of the extended one are not fixed, which will change with the wall accommodation coefficient and the Knudsen number of the gas flow. Using the extended slip velocity condition, an improved modified Reynolds equation for thin-film gas lubrication is established. From solving the improved modified Reynolds equation, the pressure distribution of the slider gas bearing is obtained and has a better agreement with that from the direct simulation Monte Carlo method under different pitch angles and wall velocities. It is found that the improved modified Reynolds equation can predict a more accurate pressure distribution of the slider gas bearing than the Fukui and Kaneko’s lubrication model from the linearized Boltzmann equation in the near transition regime.
引用
收藏
页码：2869 / 2875
页数：6
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