| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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A new kind of hairpin-like vortical structure induced by cross-interaction of sinuous streaks in turbulent channel |
| Jian Li(李健)1, Gang Dong(董刚)2, Hui Zhang(张辉)2, Zhengshou Chen(陈正寿)1,3, Zhaode Zhang(张兆德)1,3 |
1 School of Naval Architecture and Mechanical-electrical Engineering, Zhejiang Ocean University, Zhoushan 316022, China;
2 National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China;
3 Key Laboratory of Offshore Engineering Technology of Zhejiang Province, Zhoushan 316022, China |
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Abstract This work is motivated by previous experimental and numerical studies which reveal that the hairpin vortex could be formed by the interaction between spanwise adjacent low-speed streaks. To prove that such an interaction mechanism is still applicable in the normal direction, two sinuous low-speed streaks with the same streamwise phase are set to be in the upper half and bottom half of a small size channel, respectively, and their evolution and interaction are investigated by direct numerical simulation. A new kind of hairpin-like vortical structure, distributed in the normal direction and straddled across both halves of the channel, is found during the cross-interaction process of the low-speed streaks. The influence of such a normal-distributed hairpin-like vortex (NHV) on the turbulent statistical regularity is also revealed. It is observed that the NHV can lead to a sudden surge of wall skin friction, but the value of the normal velocity as well as the streamwise and spanwise vorticity sharply decrease to zero in the center of the channel.
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Received: 30 January 2018
Revised: 26 March 2018
Accepted manuscript online:
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PACS:
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47.27.De
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(Coherent structures)
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47.27.nd
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(Channel flow)
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47.32.cb
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(Vortex interactions)
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| Fund: Project supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. LQ18A020002), the National Natural Science Foundation of China (Grant No. 41776105), and the Foundation of the Educational Committee of Zhejiang Province, China (Grant No. Y201737053). |
Corresponding Authors:
Gang Dong
E-mail: dgvehicle@yahoo.com
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Cite this article:
Jian Li(李健), Gang Dong(董刚), Hui Zhang(张辉), Zhengshou Chen(陈正寿), Zhaode Zhang(张兆德) A new kind of hairpin-like vortical structure induced by cross-interaction of sinuous streaks in turbulent channel 2018 Chin. Phys. B 27 084701
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| [1] |
Theodorsen T Mechanism of turbulence 1952 Proceedings of the Second Mid-western Conference on Fluid Mechanics, Columbus, USA, p. 1
|
| [2] |
Wu X and Moin P 2009 J. Fluid Mech. 630 1
|
| [3] |
Hu H B, Du J, Huang S H and Wang Y 2013 Chin. Phys. B 22 074703
|
| [4] |
Wang W, Guan X L and Jiang N 2014 Chin. Phys. B 23 104703
|
| [5] |
Tang Z Q and Jiang N 2012 Exp. Fluids 53 2
|
| [6] |
Zhang N, Lu L P, Duan Z Z and Yuan X J 2008 Appl. Math. Mech. Engl. 29 1
|
| [7] |
Klebanoff P S, Tidstrom K D and Sargent L M 1962 J. Fluid Mech. 2 1
|
| [8] |
Herbert T1984 AIAA Paper 84 9
|
| [9] |
Wang W Z and Tang D B 2003 Acta Mech. Sin. 19 6
|
| [10] |
Smith C R, Walker J D A, Haidari A H and Sobrun U 1991 Philos. T. R. Soc. B. 336 1641
|
| [11] |
Smith C R and Walker J D A 1995 Turbulent wall-layer vortices (Netherlands: Springer) p. 235
|
| [12] |
Zhou J, Adrian R J, Balachandar S and Kendall T M 1999 J. Fluid Mech. 387 353
|
| [13] |
Liu C Q and Chen L 2011 Comput. Fluids 45 1
|
| [14] |
Asai M, Minagawa M and Nishioka M 2002 J. Fluid Mech. 455 1
|
| [15] |
Brandt L 2007 Eur. J. Mech. B 26 1
|
| [16] |
Adrian R J, Balachandar S and Lin Z C 2001 Ksme Int. J. 15 12
|
| [17] |
Brandt L and De Lange H C 2008 Phys. Fluids 20 024107
|
| [18] |
Konishi Y and Asai M 2010 Fluid Dyn. Res. 42 035504
|
| [19] |
Li J, Dong G and Lu Z H 2014 Fluid Dyn. Res. 46 5
|
| [20] |
Sandham N D and Kleiser L 1992 Fluid Dyn. Res. 245 1
|
| [21] |
Jim'enez J and Moin P 1991 J. Fluid Mech. 225 1
|
| [22] |
Adrian R J and Liu Z C 2002 J. Vision 5 1
|
| [23] |
Zhao Y M, Yang Y and Chen S Y 2016 J. Fluid Mech. 793 1
|
| [24] |
Canuto C 1988 Spectral methods in fluid dynamics (New York: Springer) p. 1.
|
| [25] |
Li J, Dong G and Zhang J L 2016 Appl. Math. Mech. Engl. 7 3
|
| [26] |
Huang L, Fan B and Dong G 2010 Phys. Fluids 22 015103
|
| [27] |
Han Y, Zhang H, Fan B C, Li J, Jiang D W and Zhao Z J 2017 Chin. Phys. B 26 084704
|
| [28] |
Schoppa W and Hussain F 2002 J. Fluid Mech. 453 1
|
| [29] |
Dean R B1978 J. Fluids Eng. 100 2
|
| [30] |
Kline S J, Reynolds W C and Schraub F A 1967 J. Fluid Mech. 30 1
|
| [31] |
Robinson S K 1991 Ann. Rev. Fluid Mech. 23 1
|
| [32] |
Li J, Dong G, Huang L P and Fan B C 2012 J. Nanjing U. Sci. Tech. No: Nat. Sci. Ed. 36 2 (in Chinese)
|
| [33] |
Jeong J, Hussain F, Schoppa W and Kim J 1997 J. Fluid Mech. 332 1
|
| [34] |
Kim J, Moin P and Moser R 1987 J. Fluid Mech. 77 1
|
| [35] |
Iwamoto K, Suzuki Y and Kasagi N 2002 Int. J. Heat Fluid Flow 23 5
|
| [36] |
Liu C Q, Wang Y Q, Yang Y and Duan Z W 2016 Sci. China-Phys. Mech. Astron. 59 8
|
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