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Chin. Phys. B, 2021, Vol. 30(3): 034703    DOI: 10.1088/1674-1056/abc7a6
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Influence of uniform momentum zones on frictional drag within the turbulent boundary layer

Kangjun Wang(王康俊)1 and Nan Jiang(姜楠)1,2,
1 Department of Mechanics, School of Mechanical Engineering, Tianjin University, Tianjin 300350, China; 2 Tianjin Key Laboratory of Modern Engineering Mechanics, Tianjin 300072, China
Abstract  Based on a set of experimental databases of turbulent boundary layers obtained from particle image velocimetry in the streamwise-wall-normal plane at friction-velocity-based Reynolds number Reτ =612, the influence of uniform momentum zones (UMZs) on the skin-friction drag is investigated. The skin-friction drag is measured by the single-pixel ensemble correlation method. The results show that the velocity fields with the number of UMZs larger than the mean value have a relatively low skin-friction drag, while the velocity fields with the number of UMZs less than the mean value have a relatively high skin-friction drag. By analyzing the statistical characteristics of UMZs, the dynamic correlation between the UMZs and skin-friction drag is explored. The velocity fields with a low number of UMZs present a sweep event. These sweep motions intensify the small-scale Reynolds shear stress in the near-wall region by modulation effects. The enhancement of small-scale Reynolds shear stress is the direct reason for the high skin-friction drag. Increasing the proportion of velocity fields with high UMZs amount may be a direction to reduce the skin-friction drag within the TBL.
Keywords:  turbulent boundary layers      uniform momentum zones      skin-friction drag  
Published:  22 February 2021
PACS:  47.85.lb (Drag reduction)  
  47.85.ld (Boundary layer control)  
  47.27.nb (Boundary layer turbulence ?)  
  47.27.De (Coherent structures)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11732010, 11972251, 11872272, 11902218, and 11802195) and the National Key R&D Program of China (Grant No. 2018YFC0705300).
Corresponding Authors:  Corresponding author. E-mail: nanj@tju.edu.cn   

Cite this article: 

Kangjun Wang(王康俊) and Nan Jiang(姜楠) Influence of uniform momentum zones on frictional drag within the turbulent boundary layer 2021 Chin. Phys. B 30 034703

1 Meinhart C D and Adrian R J 1995 Phys. Fluids 7 694
2 Adrian R J, Meinhart C D and Tomkins C D 2000 J. Fluid Mech. 422 1
3 Kwon Y S, Philip J, De Silva C M, Hutchins N and Monty J P 2014 J. Fluid Mech. 751 228
4 Eisma J, Westerweel J, Ooms G and Elsinga G E 2015 Phys. Fluids 27 055103
5 De Silva C M, Hutchins N and Marusic I 2016 J. Fluid Mech. 786 309
6 Townsend A A1980 The Structure of Turbulent Shear Flow 2nd edn (Cambridge: Cambridge University Press)
7 Perry A E and Chong M S 1982 J. Fluid Mech. 119 173
8 Marusic I and Perry A E 1995 J. Fluid Mech. 298 389
9 Perry A E and Marusic I 1995 J. Fluid Mech. 298 361
10 Laskari A, R de Kat, R J Hearst and B Ganapathisubramani 2018 J. Fluid Mech. 842 554
11 Baars W J, K M Talluru, N Hutchins and I Marusic 2015 Exps. Fluids 56 10
12 Lang S S, Geng X G and Zang D Y 2014 Acta Phys. Sin. 63 084704 (in Chinese)
13 Mei D J, Fan BC, Chen Y H and Ye J F 2010 Acta Phys. Sin. 59 8335 (in Chinese)
14 Han Y, Zhang H, Fan B C, Li J, Jiang D W and Zhao Z J 2017 Chin. Phys. B 26 084704
15 Li S, Jiang N, Yang S Q, Huang Y X and Wu Y H 2018 Chin. Phys. B 27 104701
16 Li S, Jiang N and Yang S Q 2019 Acta Phys. Sin. 68 074702 (in Chinese)
17 Hutchins N, Monty J P, Ganapathisubramani B, Ng H C H and Marusic I 2011 J. Fluid Mech. 673 255
18 Hwang J and Sung H J 2017 J. Fluid Mech. 829 751
19 Bai H L, Y Zhou, W G Zhang, S J Xu, Y Wang and R A Antonia 2014 J. Fluid Mech. 750 316
20 Tian H P, Zhang J X, Jiang N and Yao Z H 2015 Exp. Therm. Fluid Sci 69 27
21 Zheng X B, Jiang N and Zhang H 2016 Chin. Phys. B 25 014703
22 Bai J X, Jiang N, Zheng X B, Tang Z Q, Wang K J and Cui X T 2018 Chin. Phys. B 27 074701
23 Jiang D W, Zhang H, Fan B H and Wang A H 2019 Chin. Phys. B 28 054701
24 Westerweel J, Geelhoed P F and Lindken R 2004 Exps. Fluids 37 375
25 K\"ahler C J, Scholz U and Ortmanns J 2006 Exp. Fluids 41 327
26 Wang J, Pan C and Wang J 2020 Phys. Rev. Fluids 5 074605
27 Shen J, Pan C and Wang J 2014 Sci. Chin.-Phys. Mech. Astron. 57 1352
28 Clauser F H 1954 J. Aero. Sci 21 91
29 Schlatter P and R \"Orl\"u 2010 J. Fluid Mech. 659 116
30 Chauhan K, Philip J, De Silva C M, Hutchins N and Marusic I 2014 J. Fluid Mech. 742 119
31 Chauhan K A, Monkewitz P A and Nagib H M 2009 Fluid Dyn. Res. 41 021404
32 De Silva C M, Hutchins N and Marusic I 19th Australasian Fluid Mechanics Conference, December 8-11, 2014, Melbourne, Australia
33 Adrian R J 2007 Phys. Fluids 19 041301
34 Fukagata K, Iwamoto K and Kasagi N 2002 Phys. Fluids 14 13
35 Hutchins N and Marusic I 2007 Phil. Trans. R. Soc. Lond. A 365 647
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