Two- and three-dimensional analysis of vortices in micro-channels

Chien Hsiung Tsai, Hui Hsiung Hou, Lung-Ming Fu

研究成果: Article同行評審

摘要

Based on the steady-state simulations using FLUENT, the possibility of vortex formation was analyzed at the corner of two- and three-dimensional micro-channels that were subjected to sudden expansion. These simulations correspond to Re = 0.1-80. The results show that vortex forms in two-dimensional micro-channels when Re = 0.1. However, in three-dimensional simulations, the formation of vortex depends on the aspect ratio of the micro-channel and its inlet to outlet ratio. The inconsistency for two-and three-dimensional analyses is attributed to the fact that the depth of the channel is infinite and therefore the frictional loss on the wall in this direction is neglected. In the three-dimensional simulations, the depth of the micro-channel is finite. Hence, the frictional loss the wall produces affects the dependence of vortex formation on Reynolds number.

原文English
頁(從 - 到)57-61
頁數5
期刊Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing
28
發行號SUPPL. 2
出版狀態Published - 2006 十二月 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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