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《Journal of Hydrodynamics》 2003-03
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Experimental investigation of flow characteristics for water in curved microchannel with small aspect ratio

YANG Wei hua, CHENG Hui er, ZHANG Zhi jun (School of Power and Energy Engineering, Shanghai Jiaotong University, Shanghai 200030, China)  
Three kinds of curved microchannels with different curvature radii and geometry dimensions were designed, and their hydraulic characteristics was tested. The great differences between the experimental results and the conventional theoretical predictions and between the experimental results and the values from the experimental correlation for the curved microchannel were found by the comparison among them. The experiment showed that under the condition of this experiment, the critical Reynolds Re c is 1000~1200, and is diminished as the decrease of the curvature radius of the curved microchannel. The influence of the curvature radius on the friction factor is increased with the decrease of the curvature radiuses. The experimental correlation to calculate the friction factor of the curved microchannels was obtained.
【CateGory Index】: O368
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