The rarefaction effect on the friction factor of gas flow in microchannels

被引：100
|
作者：
Morini, GL
Spiga, M
Tartarini, P
机构：
[1] Univ Modena, DIMeC, I-41100 Modena, Italy
[2] Univ Bologna, DIENCA, I-40100 Bologna, Italy
[3] Univ Parma, Dip Ingn Ind, I-43100 Parma, Italy
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2004年 / 35卷 / 3-6期
关键词：
microchannels; gas flow; friction factor; rarefaction; slip flow; Knudsen number;
D O I：
10.1016/j.spmi.2003.09.013
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Microfluidic devices are used today in many engineering applications. However, despite much progress in this field, the fundamental understanding of fluid flow and heat transfer on the microscale is still not satisfactory. In this study, the rarefaction effects on the pressure drop for an incompressible flow through silicon microchannels having a rectangular, trapezoidal or double-trapezoidal cross-section are investigated. The roles of the Knudsen number and the cross-section aspect ratio in the friction factor reduction due to the rarefaction are pointed out. (C) 2004 Elsevier Ltd. All rights reserved.
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页码：587 / 599
页数：13
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