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| 表面粗糙度对微细管内气体流动特性的影响 | |
| 引用本文： | 陈冰雁,姚朝晖,何枫,丁英涛. 表面粗糙度对微细管内气体流动特性的影响[J]. 应用力学学报, 2003, 20(3): 1-4 |
| 作者姓名： | 陈冰雁 姚朝晖 何枫 丁英涛 |
| 作者单位： | 清华大学,北京,100084 |
| 基金项目： | 教育部留学回国人员基金，“985”骨干人才支持计划 |
| 摘 要： | 采用了表面粗糙度粘性系数模型对微细管内的气体流动进行数值模拟，以研究微管内壁表面粗糙度对微管内气体流动的影响。运用本文改进的表面粗糙度粘性系数模型，数值模拟与实验数据十分吻合。计算结果表明，进出口压力一定时，表面粗糙度对流场的压力、密度及温度分布的影响不大，但是对速度场的影响十分显著，表面粗糙度使气体流动速度减小，并使壁面附近的速度梯度减小，从而使通过管道的气体质量流量减小，在微管内的气体流动中，表面粗糙度的影响是不能被忽略的。 |
| 关 键 词： | 表面粗糙度 微细管 气体流动特性 粘性系数模型 速度场 流场 |
| 文章编号： | 1000-4939(2003)03-0001-04 |
| 修稿时间： | 2002-02-10 |
The Effects of Surface Roughness on the Gas Flow in Microchannels |
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| Chen Bingyan Yao Zhaohui He Feng Ding Yingtao. The Effects of Surface Roughness on the Gas Flow in Microchannels[J]. Chinese Journal of Applied Mechanics, 2003, 20(3): 1-4 | |
| Authors: | Chen Bingyan Yao Zhaohui He Feng Ding Yingtao |
| Abstract: | Numerical simulations are conducted to investigate the effects of surface roughness on flow characteristics of gas through microchannels by introducing a surface roughness viscosity. Using the modified surface roughness viscosity model, an excellent agreement between the numerical results and the experimental data is found. The computational results indicate that surface roughness has little influence on pressure, density and temperature of the flow field. But its effect on velocity of the flow field is pronounced. The velocity of the gas flow and the velocity gradient near the wall is decreased. Therefore the mass flow rate through the microchannels is also decreased. The effects of surface roughness on the gas flow in microchannels should not be neglected. |
| Keywords: | surface roughness microchannel flow characteristics. |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |