Measurement of velocity profiles in a rectangular microchannel with aspect ratio α = 0.35
文献类型：期刊论文
| 作者 | Zheng X(郑旭); Li ZH(李战华) |
| 刊名 | Experiments in Fluids
 |
| 出版日期 | 2008 |
| 卷号 | 44期号:6页码:951-959 |
| 通讯作者邮箱 | lili@imech.ac.cn |
| 关键词 | Particle Image Velocimetry Slip Flow Microfluidics Motion Wall |
| ISSN号 | 0723-4864 |
| 通讯作者 | Zhanhua SILBER-LI（李战华） |
| 合作状况 | 其它 |
| 中文摘要 | In this work, we measured 14 horizontal velocity profiles along the vertical direction of a rectangular microchannel with aspect ratio alpha = h/w = 0.35 (h is the height of the channel and w is the width of the channel) using microPIV at Re = 1.8 and 3.6. The experimental velocity profiles are compared with the full 3D theoretical solution, and also with a Poiseuille parabolic profile. It is shown that the experimental velocity profiles in the horizontal and vertical planes are in agreement with the theoretical profiles, except for the planes close to the wall. The discrepancies between the experimental data and 3D theoretical results in the center vertical plane are less than 3.6%. But the deviations between experimental data and Poiseuille's results approaches 5%. It indicates that 2D Poiseuille profile is no longer a perfect theoretical approximation since a = 0.35. The experiments also reveal that, very near the hydrophilic wall (z = 0.5-1 mu m), the measured velocities are significantly larger than the theoretical velocity based on the no-slip assumption. A proper discussion on some physical effects influencing the near wall velocity measurement is given. |
| 学科主题 | 实验流体力学 |
| 类目[WOS] | Engineering, Mechanical; Mechanics |
| 关键词[WOS] | PARTICLE IMAGE VELOCIMETRY; SLIP; FLOW; MICROFLUIDICS; MOTION; WALL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000256755400010 |
| 公开日期 | 2009-12-30 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/33012]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Zheng X,Li ZH. Measurement of velocity profiles in a rectangular microchannel with aspect ratio α = 0.35[J]. Experiments in Fluids,2008,44(6):951-959. |
| APA | Zheng X,&Li ZH.(2008).Measurement of velocity profiles in a rectangular microchannel with aspect ratio α = 0.35.Experiments in Fluids,44(6),951-959. |
| MLA | Zheng X,et al."Measurement of velocity profiles in a rectangular microchannel with aspect ratio α = 0.35".Experiments in Fluids 44.6(2008):951-959. |
入库方式： OAI收割
来源：力学研究所
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