Study on characteristics of flow field in micro pin fin array based on Micro-PIV

被引：0
作者：
Liu Z. [1 ]
Dong K. [1 ]
Lyu M. [1 ]
Ji C. [1 ]
Jiang Y. [1 ]
机构：
[1] Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan
来源：
Liu, Zhigang (zgliu9322@163.com) | 1600年 / Materials China卷 / 72期
关键词：
Flow field; Micro pin fin array; Micro-PIV; Microchannels; Microfluidics; Streamline; Vortex;
D O I：
10.11949/0438-1157.20210427
中图分类号：
学科分类号：
摘要：
Micro particle image velocimetry (Micro-PIV) system was used to study the flow field characteristics of deionized water in micro pin fin arrays with diameter of micro pin fin D=0.4 mm in Reynolds number (Re) range of 50-800. The streamline distribution and velocity field in the staggered and in-line micro pin fin arrays were obtained at different Reynolds numbers. The effects of Re and micro pin fin arrangement on vortex structure and velocity distribution in the wake region were analyzed. The results showed that in the range of Re=50-700, the vortex structure appeared in the staggered and in-line micro pin fin arrays. When Re=800, the vortex shedding began in the staggered micro pin fin array. The vortex length in the wake region of the staggered micro pin fin array increased with the increase of Re. While for the in-line micro pin fin array, the vortex length increased with the increase of Re at low Re, and kept the value of the longitudinal micro pin fin spacing when Re≥300. The streamwise velocity in the main flow area of the in-line micro pin fin array was higher than that of the staggered micro pin fin array. While the transverse velocity in the staggered micro pin fin array was higher than that of the in-line micro pin fin array, and the maximum value was about 25% higher than that of the in-line micro pin fin array. The staggered arrangement of the micro pin fin enhanced the mixing of the fluid in the micro channel. © 2021, Editorial Board of CIESC Journal. All right reserved.
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页码：5094 / 5101
页数：7
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