Analysis of velocity slipping at wall boundary under rarefied gas condition based on the effect of viscosity
Analysis of velocity slipping at wall boundary under rarefied gas condition based on the effect of viscosity
复制标题
基于粘性效应的稀薄气体条件下壁面速度滑移分析
DOI：
10.1108/ilt-03-2017-0080
复制
发表时间：
2018-10
影响因子：
1.6
通讯作者：
宁方伟
中科院分区：
文献类型：
--
作者：
杨绍华;龙威;宁方伟
目的
基于分层理论（空气静压导轨充气支撑区薄膜沿高度方向分为近壁层、薄层和连续流层）建立速度滑移模型，并结合各层粘度变化建立速度滑移模型。
设计/方法论/途径
采用LAMMPS和二维分子动力学方法进行模拟分析，得出相关结论。
研究结果
高温时，粘度低，速度滑移大，近壁层和薄层速度差距大。当温度一定时，无因次滑移长度与Kn数成线性关系。
研究局限性/影响
提出了等效粘度对气体滑移模型的影响。粘度越小，气速滑移越大，温度越高，气速滑移越大，近壁层与薄层的速度差距越大。当温度一定时，无量纲滑移长度ls与Kn数成线性关系。
原创性/价值
建立了板间润滑膜速度滑移的全局模型，并基于分层理论给出了各层滑移模型的数学表达式。
Purpose
Velocity slipping model, based on the stratification theory (the film in inflatable support area of aerostatic guide way was divided into near wall layer, thin layer and continuous flow layer in the direction of height), was established, and the model was combined with viscosity changes in each layer.
Design/methodology/approach
Simulated and analyzed by LAMMPS and two-dimensional molecular dynamics method, some relevant conclusions were drawn.
Findings
At a high temperature, viscosity is low, velocity slipping is large and velocity gaps in near-wall layer and thin layer are large. When the temperature is constant, the dimensionless slipping length and Kn number are linear.
Research limitations/implications
The effect of the equivalent viscosity on gas slipping model is proposed. viscosity is smaller, gas velocity slipping is greater, temperature is higher, gas velocity slipping is greater, velocity gap of near wall layer and thin layer is larger. When the temperature is constant, the dimensionless slipping length ls and Kn number are linear.
Originality/value
The global model of lubricating film velocity slipping between plates was established, and mathematical expression of slipping model in each layer, based on the stratification theory, was presented.
登录
查看更多内容
影响因子：
64.8
作者：
R. H. Fowler
通讯作者：
R. H. Fowler
微米管道中压力驱动液体流动的边界速度滑移
DOI：
10.1007/s11434-010-4188-y
发表时间：
2011-04
期刊：
科学通报(英文版)
影响因子：
--
作者：
Gu BoQin;Shao ChunLei;Zhou JianFeng
通讯作者：
Zhou JianFeng
DOI：
10.1016/0042-207x(74)93133-9
发表时间：
2018-12
期刊：
Foundations of Plasma Physics for Physicists and Mathematicians
影响因子：
--
作者：
Walter Kauzmann
通讯作者：
Walter Kauzmann
DOI：
10.1360/132011-827
发表时间：
2013
期刊：
--
影响因子：
--
作者：
Haijun Zhang;Chang-sheng Zhu;Qin Yang;Z. Zhong
通讯作者：
Haijun Zhang;Chang-sheng Zhu;Qin Yang;Z. Zhong
影响因子：
2.3
作者：
W. Chan;Yuhong Sun
通讯作者：
W. Chan;Yuhong Sun