ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Effects of square micro-pillar array porosity on the liquid motion of near surface layer |
Xiaoxi Qiao(乔小溪)1, Xiangjun Zhang(张向军)2, Ping Chen(陈平)1, Yu Tian(田煜)2, Yonggang Meng(孟永钢)2 |
1 School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2 State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China |
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Abstract The influence rules of square micro-pillar array porosity on the liquid motion characteristics of the near-surface layer are investigated by quartz crystal microbalance (QCM). QCM is a powerful and promising technique in studying the interfacial behavior, which exhibits great advantages in investigating the effects of surface microstructure, roughness, and array. In our experiments, three different arrays with the same height of about 280 nm and center distance of 200 μm, but different diameters of about 78 μm, 139 μm, and 179 μm are investigated. The results indicate that when the surface array has a large porosity, its influence on the liquid motion of the near surface layer is slight, thus resulting in a small increase of half-bandwidth variation due to the additional friction energy dissipation. When the surface array has a small porosity, the array tends to make the liquid film trapped in the array oscillating with the substrate, then there may be a layer of liquid film behaving like rigid film, and it also will make the liquid motion near the array layer more complicated. Thus for the #3 surface with a small porosity, both the absolute values of frequency shift |Δf3| and half-bandwidth variation ΔΓ3 increase obviously. The experimental results show good consistence with the theoretical model of Daikhin and Urbakh. This study sheds light on understanding the influence mechanism of surface array porosity on the liquid motion of near-surface layer.
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Received: 18 September 2019
Revised: 23 October 2019
Accepted manuscript online:
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PACS:
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47.55.dr
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(Interactions with surfaces)
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47.54.De
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(Experimental aspects)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51905032), the National Key Research and Development Program of China (Grant No. 2018YFC0810500), and the Fundamental Research Funds for the Central Universities, China (Grant No. FRF-TP-18-012A2). |
Corresponding Authors:
Xiaoxi Qiao
E-mail: qxx41051134@126.com
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Cite this article:
Xiaoxi Qiao(乔小溪), Xiangjun Zhang(张向军), Ping Chen(陈平), Yu Tian(田煜), Yonggang Meng(孟永钢) Effects of square micro-pillar array porosity on the liquid motion of near surface layer 2020 Chin. Phys. B 29 024702
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[1] |
Priezjev N V 2011 J. Chemical Physics 135 204704
|
[2] |
Yamada T, Hong C, Gregory O J and Faghri M 2011 Microfluid. Nanofluid. 11 45
|
[3] |
Jung Y C and Bhushan B 2010 J. Phys. Condens. Matter An Inst. Phys. J. 22 35104
|
[4] |
Lyu S, Dang C N, Kim D, Hwang W and Yoon B 2013 Appl. Surf. Sci. 286 206
|
[5] |
Ou J, Perot B and Rothstein J P 2004 Phys. Fluids 16 4635
|
[6] |
Woolford B, Prince J, Maynes D and Webb B W 2009 Phys. Fluids 21 85106
|
[7] |
Lee S H and Kim W B 2016 J. Power Sources 307 38
|
[8] |
Anselme K 2000 Biomaterials 21 667
|
[9] |
Suh M S, Chae Y H, Kim S S, Hinoki T and Kohyama A 2010 Tribol. Int. 43 1508
|
[10] |
Wakuda M, Yamauchi Y, Kanzaki S and Yasuda Y 2003 Wear 254 356
|
[11] |
Zhao Y P 2012 Physical Mechanics of Surfaces and Interfaces (Beijing: Science Press) (in Chinese)
|
[12] |
Daikhin L and Urbakh M 1996 Langmuir 12 6354
|
[13] |
Daikhin L, Gileadi E, Katz G, Tsionsky V, Urbakh M and Zagidulin D 2002 Anal. Chem. 74 554
|
[14] |
Qiao X X, Zhang X J, Tian Y and Meng Y G 2016 Appl. Physics Reviews 3 031106
|
[15] |
Sahraoui M, Kaviany M, Mechanics A and Arbor A 1992 Int. J. Heat Mass Britain 35 927
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