Negative Knudsen force on heated microbeams
文献类型：期刊论文
| 作者 | Zhu TS; Ye WJ; Zhang J(张俊)
|
| 刊名 | Physical Review E
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:5页码:56316 |
| 通讯作者邮箱 | mewye@ust.hk |
| 关键词 | Boltzmann-Equation Spherical-Particle Numerical-Analysis Rarefied-Gas Thermophoresis Pressure Model Flow |
| ISSN号 | 1539-3755 |
| 产权排序 | [Zhu, Taishan; Ye, Wenjing; Zhang, Jun] Hong Kong Univ Sci & Technol, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China; [Ye, Wenjing] Hong Kong Univ Sci & Technol, KAUST HKUST Micro Nanofluid Joint Lab, Hong Kong, Hong Kong, Peoples R China; [Zhang, Jun] Chinese Acad Sci, Inst Mech, Lab High Temp Gas Dynam, Beijing 100080, Peoples R China |
| 通讯作者 | Zhu, TS (reprint author), Hong Kong Univ Sci & Technol, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China |
| 合作状况 | 国内 |
| 中文摘要 | Knudsen force acting on a heated microbeam adjacent to a cold substrate in a rarefied gas is a mechanical force created by unbalanced thermal gradients. The measured force has its direction pointing towards the side with a lower thermal gradient and its magnitude vanishes in both continuum and free-molecule limits. In our previous study, negative Knudsen forces were discovered at the high Knudsen regime before diminishing in the free-molecule limit. Such a phenomenon was, however, neither observed in experiment [A. Passian et al., Phys. Rev. Lett. 90, 124503 (2003)], nor captured in the latest numerical study [J. Nabeth et al., Phys. Rev. E 83, 066306 (2011)]. In this paper, the existence of such a negative Knudsen force is further confirmed using both numerical simulation and theoretical analysis. The asymptotic order of the Knudsen force near the collisionless limit is analyzed and the analytical expression of its leading term is provided, from which approaches for the enhancement of negative Knudsen forces are proposed. The discovered phenomenon could find its applications in novel mechanisms for pressure sensing and actuation. |
| 学科主题 | Physics |
| 分类号 | 一类 |
| 类目[WOS] | Physics, Fluids & Plasmas ; Physics, Mathematical |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | BOLTZMANN-EQUATION ; SPHERICAL-PARTICLE ; NUMERICAL-ANALYSIS ; RAREFIED-GAS ; THERMOPHORESIS ; PRESSURE ; MODEL ; FLOW |
| 收录类别 | SCI ; EI |
| 资助信息 | This work is supported in part by Award No. SA-C0040/UK-C0016, made by King Abdullah University of Science and Technology, and in part by Hong Kong Research Grants Council under Competitive Earmarked Research Grant No. 621408. |
| 原文出处 | http://dx.doi.org/10.1103/PhysRevE.84.056316 |
| 语种 | 英语 |
| WOS记录号 | WOS:000297467300007 |
| 公开日期 | 2012-04-01 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/45180]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhu TS,Ye WJ,Zhang J. Negative Knudsen force on heated microbeams[J]. Physical Review E,2011,84(5):56316. |
| APA | Zhu TS,Ye WJ,&张俊.(2011).Negative Knudsen force on heated microbeams.Physical Review E,84(5),56316. |
| MLA | Zhu TS,et al."Negative Knudsen force on heated microbeams".Physical Review E 84.5(2011):56316. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。