基于Micro-PIV的不同截面形状微柱群内部流场特性研究

doi:10.3976/j.issn.1002-4026.2019.05.010

Abstract

Abstract: The flow around staggered micro-cylinders with different cross-sectional shapes, such as circular, elliptical, and diamond, was investigated via micro particle image velocimetry (Micro-PIV). Flow field information, such as velocity field and streamline, was obtained using different Reynolds numbers（Re）, and the impacts of Re and cross-sectional shape on the flow field structure were analyzed. Results show that boundary layer separation in the process of flow around the micro-cylinder lagged in comparison to macro-scale flow around the cylinder. Flow separation in the wake region of the micro-cylinder having a circular cross-section occurred earlier than those of micro-cylinders having elliptical and diamond-shaped cross-sections. A vortex structure appeared in the wake region of the micro-cylinders, and backflow length increased with the increasing Re. The backflow length and backflow area of the flow around the micro-cylinder having a circular cross-section are the largest among the three types of cross-sections.

Key words: Micro-PIV, micro-cylindergroups, flow field property, streamline, vortex

CLC Number:

TK124

LIU Zhi-gang, LÜ Ming-ming, KONG Ling-jian, JIA Lei, JIANG Ya-ke . Study on flow field in micro-cylinder groups with different cross-section shapes by Micro-PIV method[J].Shandong Science, 2019, 32(5): 81-87.

References 13

1	KANDLIKAR S G, GRANDE W J. Evaluation of single-phase flow in micro channels for high heat flux chip cooling-Thermohydraulic performance enhancement and fabrication technology [J]. Heat Transfer Engineering, 2004, 25(8): 5-16. doi: 10.1080/01457630490519772
2	刘志刚，张承武，管宁，等．尺度效应对低Reynolds数下微/小柱群通道内对流换热的影响[J].化工学报，2011，62（7）：1852-1859. doi: 10.3969/j.issn.0438-1157.2011.07.010
3	KOSAR A, MISHRA C, PELES Y. Laminar flow across a bank of low aspect ratio micro pin fins[J]. Journal of Fluids Engineering, 2005, 127(3):419-430. doi: 10.1115/1.1900139
4	YANG K S, CHU W H, CHEN I Y, Wang C C. A comparative study of the airside performance of heat sinks having pin fin configurations[J]. International Journal of Heat and Mass Transfer, 2007, 50(23/24):4661-4667. doi: 10.1016/j.ijheatmasstransfer.2007.03.006
5	SAHITI N, DURST F, GEREMIA P. Selection and optimization of pin cross-sections for electronics cooling[J]. Applied Thermal Engineering, 2007, 27(1):111-119. doi: 10.1016/j.applthermaleng.2006.05.018
6	孙姣，张宾，唐湛棋，等．旋转圆柱绕流的PIV实验研究[J]. 实验流体力学，2016，30（1）：81-90. doi: 10.11729/syltlx20150037
7	GOHARZADEH A, MOLKI A. Measurement of fluid velocity development behind a circular cylinder using particle image velocimetry (PIV) [J]. European Journal of Physics, 2015, 36(1):015001. doi: 10.1088/0143-0807/36/1/015001
8	LEE S J, DAICHIN. Flow past a circular cylinder over a free surface: Interaction between the near wake and the free surface deformation[J]. Journal of Fluid and Structures, 2004, 19(8):1049-1059. doi: 10.1016/j.jfluidstructs.2004.06.006
9	YAGMUR S, DOGAN S, AKSOY M H, et al. Comparison of flow characteristics around an equilateral triangular cylinder via PIV and large eddy simulation methods[J]. Flow Measurement and Instrumentation, 2017, 55:23-36. doi: 10.1016/j.flowmeasinst.2017.04.001
10	涂程旭，王昊利，林建忠．圆柱绕流的流场特性及涡脱落规律研究[J]. 中国计量学院学报，2008，19（2）：98-102． doi: 10.3969/j.issn.1004-1540.2008.02.002
11	李永，吕明明，刘志刚，等．流体绕流微柱群的Micro-PIV实验研究[J].山东科学，2018，31（6）：50-54. doi: 10.3976/j.issn.1002-4026.2018.06.008
12	张承武，浦龙梅，姜桂林，等．不同截面形状微肋片内流动阻力特性[J]．化工学报，2014，65（6）：2042-2048. doi: 10.3969/j.issn.0438-1157.2014.06.013
13	祝叶，管宁，李栋，等．不同截面形状超疏水微肋阵内对流换热特性[J]. 化工学报，2017，68（1）：63-71. doi: 10.11949/j.issn.0438-1157.20161079

Metrics

Comments

Recommended 0

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits third parties to freely share (i.e., copy and redistribute the material in any medium or format) and adapt (i.e., remix, transform, or build upon the material) the articles published in this journal, provided that appropriate credit is given, a link to the license is provided, and any changes made are indicated. The material may not be used for commercial purposes. For details of the CC BY-NC 4.0 license, please visit: https://creativecommons.org/licenses/by-nc/4.0

[1]	ZHANG Ruihan, JIANG Lewen, WANG Yue, HAO Zongrui. Optimization of structural parameters and oil removal effect of a self-induced vortex oil collector [J]. Shandong Science, 2024, 37(6): 12-21.
[2]	LIU Jin, TAN Hua, SU Liang, QIU Guoji, LIU Rui, LUO Chongxin, WANG Yu, LIU Hao. Streamline optimization analysis of side-scan sonar on small autonomous underwater vehicle [J]. Shandong Science, 2023, 36(6): 8-14.
[3]	LI Ji-Chao, JI Can, LIU Zhi-gang, LI Hui-jun, MA Chao, CHI Wen-tao. Experimental study on flow characteristics in a microchannel with a single cylinder [J]. Shandong Science, 2020, 33(4): 53-62.
[4]	LIU Jin, JIANG Hui-lue, LIU Bo, DU Da-wei. External flow field analysis and streamlined improvement of a car [J]. Shandong Science, 2020, 33(3): 87-92.
[5]	LI Yong, Lü Ming-ming, LIU Zhi-gang, ZHU Ye . Experimental study on flow past micro-cylinder-groups by Micro-PIV method [J]. SHANDONG SCIENCE, 2018, 31(6): 50-54.
[6]	GUAN Ning, LIU Zhigang*, ZHANG Chengwu, JIANG Guilin, DING Ning. Impact of heating wall on vortex shedding of microcylinders [J]. SHANDONG SCIENCE, 2015, 28(2): 31-38.
[7]	WANG Wen-Lei, XU Jian-Bo, ZHOU Li-Feng, HAN Long, SONG Xiao-Fang. Characteristics of composite vortex formed by overlay of two annulus vortexes [J]. J4, 2013, 26(2): 13-17.
[8]	LI Yu-Duo, LI Xiang-Ying, ZHOU Li-Feng, WANG Wen-Lei. The features of partially coherent ring vortex [J]. J4, 2012, 25(3): 50-53.

Study on flow field in micro-cylinder groups with different cross-section shapes by Micro-PIV method

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References 13

Related Articles 8

Metrics

Comments

Recommended 0