| 微通道入口处的摩擦因子与努塞尔数 |
| |
| 引用本文： | 陈熙,许波.微通道入口处的摩擦因子与努塞尔数[J].西安交通大学学报,2002,36(11):1129-1132. |
| |
| 作者姓名： | 陈熙 许波 |
| |
| 作者单位： | 清华大学工程力学系,100084,北京 |
| |
| 基金项目： | 国家自然科学基金重点资助项目 (5 9836 2 2 0 ) |
| |
| 摘 要： | 针对具有均匀入口速度与温度剖面的微通道中的气体流动与传热，证明了在速度滑移与温度跳跃区。通道入口处的摩擦因子与努塞尔数为有限值，它们的具体数值依赖于克努森数以及壁面和气体分子间的动量和能量交换的完善程度，而和微通道的横截面形状无关。
|
| 关 键 词： | 微通道流动 速度滑移区 入口努塞尔数 入口摩擦因子 流动传热 能量交换 |
| 文章编号： | 0253-987X(2002)11-1129-04 |
| 修稿时间： | 2002年3月18日 |
Entrance Friction Factor and Nusselt Number of a Micro-Duct |
| |
| Chen Xi,Xu Bo.Entrance Friction Factor and Nusselt Number of a Micro-Duct[J].Journal of Xi'an Jiaotong University,2002,36(11):1129-1132. |
| |
| Authors: | Chen Xi Xu Bo |
| |
| Abstract: | Expressions were derived for the friction factor and Nusselt number at the entrance of a micro-sized duct with uniform inlet gas velocity and temperature profiles and for the velocity-slip and temperature-jump regime. It is shown that the friction factor and Nusselt number at the duct entrance are finite values. They are dependent on the Knudsen number and the accommodation factors the transfer of trangential momentum and energy between the incident molecules and the duct wall,but are independent of the geometrical form of the duct cross section. |
| |
| Keywords: | micro-duct flow and heat transfer velocity slip and temperature jump regime entrance friction factor entrance Nusselt number analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
