Abstract
Particle image velocimetry measurements are carried out in the wake of a circular cylinder at two values of the Reynolds number (3460 and 5800), based on the free stream velocity and the cylinder diameter, to investigate the spatial organization of vortical motions in the intermediate wake. The proper orthogonal decomposition method (POD) is used to extract information from the vorticity data. While the coherent motion associated with the von Kármán vortex street is well reflected in the first two POD modes which account for about 8% of the total enstrophy, the motion associated with the secondary vortex street is captured in the third and fourth POD modes which account for only about 2.4% of the total enstrophy. The measurements show that the secondary vortex street only alternates in space. This is significantly different from the far wake where there is continuous switching between symmetric and antisymmetric arrangements about the centreline (e.g. Bisset et al., J Fluid Mech 218:439–461, 1990), the alternative regime being nearly twice as frequent as the opposite regime.
Graphical abstract
Similar content being viewed by others
References
Antonia RA, Mi J (1998) Approach towards self-preservation of turbulent cylinder and screen wakes. Exp Thermal Fluid Sci 17:277–284
Antonia RA, Browne LWB, Bisset DK, Fulachier L (1987) A description of the organized motion in the turbulent far wake of a cylinder at low Reynolds number. J Fluid Mech 184:423–444
Berkooz G, Holmes P, Lumley JL (1993) The proper orthogonal decomposition in the analysis of turbulent flows. Annu Rev Fluid Mech 25(1):539–575
Bisset DK, Antonia RA, Browne LWB (1990) Spatial organization of large structures in the turbulent far wake of a cylinder. J Fluid Mech 218:439–461
Browne LWB, Antonia RA, Shah DA (1989) On the origin of the organised motion in the turbulent far-wake of a cylinder. Exp Fluids 7(7):475–480
Chen JG, Zhou Y, Zhou TM, Antonia RA (2016) Three-dimensional vorticity, momentum and heat transport in a turbulent cylinder wake. J Fluid Mech 809:135–167
Cimbala JM (1984) Large structure in the far wake of two-dimensional bluff bodies, Ph.D. Thesis. California Institute of Technology, Pasadena
Cimbala JM (2006) Large structure in the far wakes of two-dimensional bluff bodies. J Fluid Mech 84(190):265–298
Dynnikova GY, Dynnikov YA, Guvernyuk SV (2016) Mechanism underlying Kármán vortex street breakdown preceding secondary vortex street formation. Phys Fluids 28(5):171–185
Feng L, Wang J, Pan C (2011) Proper orthogonal decomposition analysis of vortex dynamics of a circular cylinder under synthetic jet control. Phys Fluids 23:014106
Keffer JF (1965) The uniform distortion of a turbulent wake. J Fluid Mech 22(1):135–159
Kumar B, Mittal S (2012) On the origin of the secondary vortex street. J Fluid Mech 711(711):641–666
Lefeuvre N, Thiesset F, Djenidi L, Antonia RA (2014) Statistics of the turbulent kinetic energy dissipation rate and its surrogates in a square cylinder wake flow. Phys Fluids 26(095):104
Lumley JL (1967) The structure of inhomogeneous turbulent flows. In: Yaglam AM, Tatarsky VI (eds) Proceedings of the international colloquium on the fine scale structure of the atmosphere and its influence on radio wave propagation, Moscow, pp 166–178
Matsui T, Okude M (1981) Vortex pairing of a Karman vortex street. In: Patterson GK, Zakin JL (eds) Proceedings of seventh biennial symposium on turbulence. University of Missouri-Rolla, Rolla, pp 303–310
Matsui T, Okude M (1983) Formation of the secondary vortex street in the wake of a circular cylinder. Springer, Berlin
Mi J, Antonia RA (1999) Evolution of centreline temperature skewness in a circular cylinder wake. Int Commun Heat Mass Transf 2:45–53
Mizushima J, Hatsuda G, Akamine H, Inasawa A, Asai M (2013) Rapid annihilation of the Kármán vortex street behind a rectangular cylinder. J Phys Soc Jpn 83(1):014,402
Papailiou DD, Lykoudis PS (1974) Turbulent vortex streets and the entrainment mechanism of the turbulent wake. J Fluid Mech 62(1):11–31
Sirovich L (1987) Turbulence and the dynamics of coherent structures. Part I: coherent structures. Q Appl Math 45:561–571
Taneda S (1983) Visual observations on the amplification of artificial disturbances in turbulent shear flows. Phys Fluids 26:2801–2806
Tang SL, Antonia RA, Djenidi L, Zhou Y (2015a) Complete self-preservation along the axis of a circular cylinder the far-wake. J Fluid Mech 786:253–274
Tang SL, Djenidi L, Antonia RA, Zhou Y (2015b) Comparison between velocity- and vorticity-based POD methods in a turbulent wake. Exp Fluids 56(8):169
Thiesset F, Antonia RA, Danaila L (2013) Scale-by-scale turbulent energy budget in the intermediate wake of two-dimensional generators. Phys Fluids 25:115105
Townsend AA (1979) Flow patterns of large eddies in a wake and in a boundary layer. J Fluid Mech 95(3):515–537
Williamson C (1996) Vortex dynamics in the cylinder wake. Annu Rev Fluid Mech 28(1):477–539
Williamson CHK, Prasad A (2006) A new mechanism for oblique wave resonance in the natural far wake. J Fluid Mech 256(256):269–313
Zhou Y, Antonia RA (1992) Convection velocity measurements in a cylinder wake. Exp Fluids 13:63–70
Zhou Y, Antonia RA (1995) Memory effects in a turbulent plane wake. Exp Fluids 19:112–120
Zhou Y, Zhang HJ, Yiu MW (2002) The turbulent wake of two side-by-side circular cylinders. J Fluid Mech 458:303–332
Acknowledgements
YZ wishes to acknowledge support given to him from Research Grants Council of Shenzhen Government through grant JCYJ20150625142543469 and NSFC through Grant 11632006. SL Tang wishes to acknowledge support given to him from NSFC through grant 11702074.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Tang, S.L., Djenidi, L., Antonia, R.A. et al. Secondary vortex street in the intermediate wake of a circular cylinder. Exp Fluids 59, 119 (2018). https://doi.org/10.1007/s00348-018-2577-1
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s00348-018-2577-1