单圆柱微通道内流动特性实验研究

doi:10.3976/j.issn.1002-4026.2020.04.008

Abstract

Abstract: In this paper, a micro-PIV system and differential pressure measurement system is used to study the flow characteristics of deionized water in a channel with a single microcylinder in the range of 10 < Re < 430. The streamlines, dimensionless velocity field, turbulence intensity distribution of different flow layers, and pressure drop are obtained. Results show that the first and second critical Reynolds numbers of the flow around the microcylinder are approximately 10 and 430, respectively. The fluid in the wake vortex has a velocity component that is perpendicular to the flow direction, and the three-dimensional characteristics of the vortex are obvious. When Re is low, the pressure drop and the length of vortices increase slowly with Re and the viscous resistance accounts for a larger proportion. With increase in Re, the vortex gradually develops simultaneously with the increase in the proportion of shape resistance, and the pressure drop increases faster with Re. When Re = 400, the slope of the pressure drop curve rises and then gradually transforms into vortex shedding.

Key words: flow around a microcylinder, micro-PIV, critical Reynolds number, vortex, turbulence intensity

CLC Number:

TK124

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.

References 26

1	过增元. 当前国际传热界的热点：微电子器件的冷却[J]. 中国科学基金, 1988, 2(2): 20-25. doi: 10.16262/j.cnki.1000-8217.1988.02.007
2	过增元. 国际传热研究前沿：微细尺度传热[J]. 力学进展, 2000, 30(1): 1-6. doi: 10.3321/j.issn:1000-0992.2000.01.001
3	TULLIUS J F, TULLIUS T K, BAYAZITOGLU Y. Optimization of short micro pin fins inminichannels[J]. International Journal of Heat and Mass Transfer, 2012, 55(15/16): 3921-3932. doi: 10.1016/j.ijheatmasstransfer.2012.03.022
4	LIU Z G, WANG Z L, ZHANG C W, et al. Flow resistance and heat transfer characteristics in micro-cylinders-group[J]. Heat and Mass Transfer, 2013, 49(5): 733-744. doi: :10.1007/s00231-013-1115-1
5	SHAFEIE H, ABOUALI O, JAFARPUR K, et al. Numerical study of heat transfer performance of single-phase heat sinks with micro pin-fin structures[J]. Applied Thermal Engineering, 2013, 58(1/2): 68-76. doi: 10.1016/j.applthermaleng.2013.04.008
6	KHAN M G, FARTAJ A. A review on microchannel heat exchangers and potential applications[J]. International Journal of Energy Research, 2011, 35(7): 553-582. doi: 10.1002/er.1720
7	WANG Y Y, SHIN J H, WOODCOCK C, et al. Experimental and numerical study about local heat transfer in a microchannel with a pin fin[J]. International Journal of Heat and Mass Transfer, 2018, 121: 534-546. doi: 10.1016/j.ijheatmasstransfer.2018.01.034
8	ZDRAVKOVICH M M. Different modes of vortex shedding: an overview[J]. Journal of Fluids and Structures, 1996, 10(5): 427-437. doi: 10.1006/jfls.1996.0029
9	ROSHKO A. On the development of turbulent wakes from vortex sheets[EB/OL].[2019-10-12]. https://digital.library.unt.edu/ark:/67531/metadc56619/.
10	FORNBERG B. A numerical study of steady viscous flow past a circular cylinder[J]. Journal of Fluid Mechanics, 1980, 98(4): 819-855. doi: 10.1017/s0022112080000419
11	WILLIAMSON C H K.Oblique and parallel modes of Vortex shedding in the wake of a circular cylinder at low Reynolds numbers[J]. Journal of Fluid Mechanics, 1989, 206: 579-627. doi: 10.1017/s0022112089002429
12	YANG X, ZEBIB A. Absolute and convective instability of a cylinder wake[J]. Physics of Fluids A: Fluid Dynamics, 1989, 1(4): 689-696. doi: 10.1063/1.857362
13	PANTON R L, ANDREOPOULOS Y. Incompressible flow[J]. Physics Today, 1996, 49(11): 89-90. doi: 10.1063/1.881530
14	GREEN R B, GERRARD J H. Vorticity measurements in the near wake of a circular cylinder at low Reynolds numbers[J]. Journal of Fluid Mechanics, 1993, 246: 675-691. doi: 10.1017/s002211209300031x
15	邹帅, 徐加辉, 周杰, 等. 过渡流下钝体绕流特性的可视化实验对比[J]. 化工学报, 2016, 67(增刊1): 210-216. doi: 10.11949/j.issn.0438-1157.20160611
16	JUNG J, KUO C J, PELES Y, et al. The flow field around a micropillar confined in a microchannel[J]. International Journal of Heat and Fluid Flow, 2012, 36: 118-132. doi: 10.1016/j.ijheatfluidflow.2012.04.009
17	WANG Y Y, HOUSHMAND F, ELCOCK D, et al. Convective heat transfer and mixing enhancement in a microchannel with a pillar[J]. International Journal of Heat and Mass Transfer, 2013, 62: 553-561. doi: 10.1016/j.ijheatmasstransfer.2013.03.034
18	WANG Y Y, PELES Y. An experimental study of passive and active heat transfer enhancement in microchannels[J]. Journal of Heat Transfer, 2014, 136(3): 031901. doi: 10.1115/1.4025558
19	WANG Y Y, NAYEBZADEH A, YU X F, et al. Local heat transfer in a microchannel with a pin fin—experimental issues and methods to mitigate[J]. International Journal of Heat and Mass Transfer, 2017, 106: 1191-1204. doi: 10.1016/j.ijheatmasstransfer.2016.10.100
20	WANG Y Y, SHIN J H, WOODCOCK C, et al. Experimental and numerical study about local heat transfer in a microchannel with a pin fin[J]. International Journal of Heat and Mass Transfer, 2018, 121: 534-546. doi: 10.1016/j.ijheatmasstransfer.2018.01.034
21	XIA G D, CHEN Z, CHENG L X, et al. Micro-PIV visualization and numerical simulation of flow and heat transfer in three micro pin-fin heat sinks[J]. International Journal of Thermal Sciences, 2017, 119: 9-23. doi: 10.1016/j.ijthermalsci.2017.05.015
22	XU F Y, PAN Z H, WU H Y. Experimental investigation on the flow transition in different pin-fin arranged microchannels[J]. Microfluidics andNanofluidics, 2018, 22: 11. doi: 10.1007/s10404-017-2030-4
23	王利静. 具有自由液面流场中圆柱绕流的数值模拟研究[D]. 哈尔滨: 哈尔滨工程大学, 2008.
24	王亚玲, 刘应中, 缪国平. 圆柱绕流的三维数值模拟[J]. 上海交通大学学报, 2001, 35(10): 1464-1469. doi: 10.3321/j.issn:1006-2467.2001.10.008
25	赵萌, 毛军, 郗艳红. 高雷诺数下有限长圆柱绕流阻力特性研究[J]. 机械工程学报, 2015, 51(22): 176-182.
26	蒋赟. 阻流比与长径比对低雷诺数圆柱绕流尾迹演化的影响研究[D]. 长沙: 中南大学, 2014.

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Experimental study on flow characteristics in a microchannel with a single cylinder

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