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首页> 外文期刊>Journal of Micromechanics and Microengineering >Liquid flow in a micro-channel
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Liquid flow in a micro-channel

机译：微通道中的液体流动

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摘要

An experimental study with MPIV (micro particle image velocimetry) flow visualization of incompressible liquid flow in a microchannel is presented. Deionized water served as a working medium. The channel was microfabricated in a PMMA substrate using an excimer laser, and was 115 mum deep, 200 mum wide and 24 000 mum long with a hydraulic diameter of about 146 Am. The pressure drop between the inlet and the outlet of the duct as well as mass flow rates were measured and friction factors were calculated for different Reynolds numbers. Data were discussed and compared with those of previous investigations of similar studies. Moreover, time evolutions of the microflow at the middle of the microchannel at Re = 50, 100, 470 and 900 were photographed. Hydrodynamic entry length correlations were found for both laminar and turbulent flow in the present microchannel.
机译：提出了使用MPIV（微粒图像测速）流动可视化微通道中不可压缩液体流动的实验研究。去离子水用作工作介质。使用准分子激光器将通道微细加工在PMMA基板中，该通道深115毫米，宽200毫米，长24000毫米，水力直径约为146 Am。测量了管道入口和出口之间的压降以及质量流量，并针对不同的雷诺数计算了摩擦系数。讨论了数据并将其与以前的类似研究进行了比较。此外，拍摄了Re = 50、100、470和900时，微通道中部微流的时间演变。在本微通道中发现了层流和湍流的流体动力学入口长度相关性。

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