Laminar-to-turbulent flow transition in microchannels

被引:52
作者
Morini, GL [1 ]
机构
[1] Univ Ferrara, Dipartimento Ingn, I-44100 Ferrara, Italy
来源
MICROSCALE THERMOPHYSICAL ENGINEERING | 2004年 / 8卷 / 01期
关键词
D O I
10.1080/10893950490272902
中图分类号
O414.1 [热力学];
学科分类号
摘要
Some experimental results on heat transfer and pressure drop through microchannels evidenced that the conventional theory, validated for large-size channels, has to be revised for channels having a hydraulic diameter smaller than I mm. Also, the transition from the laminar to the turbulent regime usually takes place at Reynolds numbers lower than those expected. This is considered a confirmation of the disagreement with the classical theory. This paper shows how many experimental results on the laminar-to-turbulent transition in microchannels can be explained by using the "Obot-Jones model," obtained by means of the conventional theory for large-size channels.
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页码:15 / 30
页数:16
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