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Chin. Phys. B, 2017, Vol. 26(1): 014703    DOI: 10.1088/1674-1056/26/1/014703
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Three-dimensional turbulent flow over cube-obstacles

Hao Lu(卢浩)1, Wen-Jun Zhao(赵文君)2, Hui-Qiang Zhang(张会强)1, Bing Wang(王兵)1, Xi-Lin Wang(王希麟)1
1. School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;
2. Faculty of Architecture, The University of Hong Kong, Hong Kong, China
Abstract  In order to investigate the influence of surface roughness on turbulent flow and examine the wall-similarity hypothesis of Townsend, three-dimensional numerical study of turbulent channel flow over smooth and cube-rough walls with different roughness height has been carried out by using large eddy simulation (LES) coupled with immersed boundary method (IBM). The effects of surface roughness array on mean and fluctuating velocity profiles, Reynolds shear stress, and typical coherent structures such as quasi-streamwise vortices (QSV) in turbulent channel flow are obtained. The significant influences on turbulent fluctuations and structures are observed in roughness sub-layer (five times of roughness height). However, no dramatic modification of the log-law of the mean flow velocity and turbulence fluctuations can be found by surface cube roughness in the outer layer. Therefore, the results support the wall-similarity hypothesis. Moreover, the von Karman constant decreases with the increase of roughness height in the present simulation results. Besides, the larger size of QSV and more intense ejections are induced by the roughness elements, which is crucial for heat and mass transfer enhancement.
Keywords:  turbulent flow      channel flow      large-eddy simulations      coherent structures  
Received:  03 August 2016      Revised:  26 September 2016      Published:  05 January 2017
PACS:  47.27.-i (Turbulent flows)  
  47.27.nd (Channel flow)  
  47.27.ep (Large-eddy simulations)  
  47.27.De (Coherent structures)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50876053).
Corresponding Authors:  Wen-Jun Zhao     E-mail:  zhaowenjunhku@gmail.com

Cite this article: 

Hao Lu(卢浩), Wen-Jun Zhao(赵文君), Hui-Qiang Zhang(张会强), Bing Wang(王兵), Xi-Lin Wang(王希麟) Three-dimensional turbulent flow over cube-obstacles 2017 Chin. Phys. B 26 014703

[1] Zhang X, Pan C, Shen J Q and Wang J J 2015 Sci. China Phys. Mech. 58 064702
[2] Zhang C, Pan C and Wang J J 2011 Exp. Fluids 51 1343
[3] Chen Z, Gao B and Wu Z 2007 Int. J. Numer. Meth. Fl. 53 149
[4] Tyagi M and Acharya S 2005 ASME J. Heat Trans. 127 486
[5] Ji W T, Zhang D C, He Y L and Tao W Q 2012 Int. J. Heat Mass Tran. 55 1375
[6] Townsend A A 1976 The Structure of Turbulent Shear Flow (Cambridge:Cambridge University Press)
[7] Orlandi P and Leonardi S 2006 J. Turbul. 7 1
[8] Orlandi P 2013 Phys. Fluids 25 110813
[9] Flack K A, Schultz M P and Connelly J S 2007 Phys. Fluids 19 095104
[10] Wu Y and Christensen K T 2007 Phys. Fluids 19 085108
[11] Castro I P 2007 J. Fluid Mech. 585 469
[12] Krogstad P A and Antonia R A 1999 Exp. Fluids 27 450
[13] Lee S H and Sung H J 2007 J. Fluid Mech. 584 125
[14] Volino R J, Schultz M P and Flack K A 2009 J. Fluid Mech. 635 75
[15] Frenzen P and Vogel C A 1995 Bound-Lay. Meteorol. 72 371
[16] Frenzen P and Vogel C A 1995 Bound-Lay. Meteorol. 75 315
[17] Oncley S P, Friehe C, Larue J C, Businger J A, Itswheire E C and Chang S S 1996 J. Atmos. Sci. 53 1029
[18] Andreas E L, Claffey K J, Jordan R E, Rairall C W, Guest P S, Persson P O L and Grachev A A 2006 J. Fluid Mech. 559 117
[19] Nagib H M and Chauhan K A 2008 Phys. Fluids 20 101518
[20] Leonardi S, Orlandi P, Smalley R J, Djenidi L and Antonia R A 2003 J. Fluid Mech. 491 229
[21] Leonardi S and Castro I P 2010 J. Fluid Mech. 651 519
[22] Gaudio R, Miglio A and Calomino F 2011 J. Hydraul. Res. 49 239
[23] Gaudio R, Miglio A and Dey S 2010 J. Hydraul. Res. 48 658
[24] Zhang H Q, Lu H, Wang B and Wang X L 2011 Chin. Phys. Lett. 28 084703
[25] Leonardi S, Tessicini F, Orlandi P and Antonia R A 2006 AIAA J. 44 2482
[26] Flores O and Jiménez J 2010 Phys. Fluids 22 071704
[27] Lozano-Duran A and Jiménez J 2014 Phys. Fluids 26 011702
[28] Yang F, Zhang H Q and Wang X L 2008 Chin. Phys. Lett. 25 191
[29] Chorin A J 1968 Math. Comp. 22 745
[30] Peskin C S 1972 J. Comput. Phys. 10 252
[31] Fadlun E A, Verzicco R, Orlandi P and Mohd-Yusof J 2000 J. Comput. Phys. 161 35
[32] Kim J, Moin P and Moser R 1987 J. Fluid Mech. 177 133
[33] Burattini P, Leonardi S and Orlandi P 2008 J. Fluid Mech. 600 403
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