Numerical research on entrance effect on internal flow characteristics in micro-scale

被引：9
|
作者：
Zhang, Tiantian [1 ]
Jia, Li [1 ]
Li, Xing [1 ]
机构：
[1] Beijing Jiaotong Univ, Sch Mech & Elect Control Engn, Beijing 100044, Peoples R China
来源：
PROGRESS IN COMPUTATIONAL FLUID DYNAMICS | 2009年 / 9卷 / 02期
基金：
中国国家自然科学基金;
关键词：
microchannel; numerical simulation; boundary layer; entrance effect; hydrodynamic entry length; HEAT-TRANSFER; SLIP-FLOW; RECTANGULAR MICROCHANNELS; SILICON MICROCHANNELS; FRICTION FACTORS; GASEOUS FLOWS; LAMINAR-FLOW; COMPRESSIBILITY; BOLTZMANN; REGION;
D O I：
10.1504/PCFD.2009.023350
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Entrance effect, which is a key factor that affects the flow and heat transfer characteristics in microchannels, has been studied in details numerically. Some strange phenomena were found, such as the maximum velocity occurs not in the channel core but near the walls due to the surface effect, et al. The effects of Reynolds number, hydrodynamic diameter and height-to-width ratio on hydrodynamic entry length are analysed. The correlation of entrance length, which is useful for designing and optimising the microchannel heat sinks and other microfluidic devices, is established.
引用
收藏
页码：67 / 76
页数：10
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