Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-19T02:42:20.856Z Has data issue: false hasContentIssue false
  • English
  • Français

Spatial organization of large structures in the turbulent far wake of a cylinder

Published online by Cambridge University Press:  26 April 2006

D. K. Bisset ,
R. A. Antonia  and
L. W. B. Browne
D. K. Bisset
Affiliation:
Department of Mechanical Engineering, University of Neweastle. NSW. 2308, Australia
R. A. Antonia
Affiliation:
Department of Mechanical Engineering, University of Neweastle. NSW. 2308, Australia
L. W. B. Browne
Affiliation:
Department of Mechanical Engineering, University of Neweastle. NSW. 2308, Australia
Get access Rights & Permissions [Opens in a new window]

Abstract

Using an array of ×-probes aligned in the plane of mean shear in the turbulent far wake of a circular cylinder, instantaneous velocity vector patterns are obtained from which stream-function approximations and sectional streamlines are derived. Conditional patterns obtained using different methods for detecting the organized motion are essentially independent of the particular method used. The spatial arrangement of the organized motion about the flow centreline varies in a continuous manner between opposing and alternating modes, the latter being nearly twice as common as the former. Results presented include conditional patterns for the opposing and alternating modes and the relative contributions made by each mode to the Reynolds stresses. A modified Rankine vortex kinematic model, based as much as possible on experimental data and incorporating both modes, yields mean velocity and Reynolds stress distributions which agree well with experiment. A quasi-three-dimensional version of the model implies that large spanwise vortices and shear-aligned double rollers represent the same three-dimensional organized motion from two different viewpoints.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 218 , September 1990 , pp. 439 - 461
Copyright
© 1990 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Antonia, R. A., Browne, L. W. B. & Bisset, D. K. 1987a Symmetric and antisymmetric modes in the turbulent far-wake. Proc. Sixth Symp. on Turbulent Shear Flows, Toulouse, pp. 3-10-1–3-10-5.Google Scholar
Antonia, R. A., Browne, L. W. B., Bisset, D. K. & Fulachier, L., 1987b A description of the organized motion in the turbulent far-wake of a cylinder at low Reynolds number. J. Fluid Mech. 184, 423–444.Google Scholar
Antonia, R. A., Chambers, A. J., Britz, D. H. & Browne, L. W. B. 1986 Organized structures in a turbulent plane jet: topology and contributions to momentum and heat transport. J. Fluid Mech. 172, 211–229.Google Scholar
Antonia, R. A. & Fulachier, L., 1986 Flow visualisation in the turbulent wake of a cylinder. Rep. T. N. FM 86/4. Department of Mechanical Engineering, University of Newcastle, NSW.
Antonia, R. A., Shah, D. A. & Browne, L. W. B. 1987c The organized motion outside a turbulent wake. Phys. Fluids 30, 2040–2045.Google Scholar
Browne, L. W. B. & Antonia, R. A. 1986 Reynolds shear stress and heat flux measurements in a cylinder wake. Phys. Fluids 29, 709–713.Google Scholar
Browne, L. W. B., Antonia, R. A. & Bisset, D. K., 1986 Coherent structures in the far-field of a turbulent wake. Phys. Fluids 29, 3612–3617.Google Scholar
Cimbala, J. M.: 1984 Large structure in the far wake of two-dimensional bluff bodies. Ph.D. thesis, California Institute of Technology.
Cimbala, J. M.: 1985 An experimental study of large structures in the far wakes of twodimensional bluff bodies. Proc. Fifth Symp. on Turbulent Shear Flows, Cornell University, New York, pp. 4.1–4.6.Google Scholar
Cimbala, J. M., Nagib, H. M. & Roshko, A., 1988 Large structure in the far wakes of twodimensional bluff bodies. J. Fluid Mech. 190, 265–298.Google Scholar
Davies, M. E.: 1976 A comparison of the wake structure of a stationary and oscillating bluff body, using a conditional averaging technique. J. Fluid Mech. 75, 209–231.Google Scholar
Ferréi Vidal, J. A. 1986 Aplicacio d'algoritmes d'intel-ligencia artificial al reconeixement d'estructures coherents en els fluxos turbulents. Ph.D. thesis, University of Barcelona, Facultad de Quimica, Tarragona.
Grant, H. L. 1958 Large eddies of turbulent motion. J. Fluid Mech. 4. 149–190.Google Scholar
Hayakawa, M. & Hussain, A. K. M. F. 1985 Eduction of coherent structures in the turbulent plane wake. Proc. Fifth Symp. on Turbulent Shear Flows, Cornell University, pp. 4.33–4.38.Google Scholar
Hussain, A. K. M. F.: 1983 Coherent structures - reality and myth. Phys. Fluids 26, 2816–2850.Google Scholar
Hussain, A. K. M. F.: 1986 Coherent structures and turbulence. J. Fluid Mech. 173, 303–356.Google Scholar
Keffer, J. F.: 1965 The uniform distortion of a turbulent wake. J. Fluid Mech. 22, 135–159.Google Scholar
Mallinson, G. D.: 1987 The calculation of the lines of a 3-dimensional vector field. Presented at the 2nd Intl Symp. Comput. Fluid Dynamics, Sydney.Google Scholar
Mumford, J. C.: 1983 The structure of the large eddies in fully turbulent shear flows. Part 2. The plane wake. J. Fluid Mech. 137, 447–456.Google Scholar
Oler, J. W. & Goldschmidt, V. W., 1981 Coherent structures in the similarity region of twodimensional turbulent jets. Proc. Third Symp. on Turbulent Shear Flows, University of California at Davis, pp. 11.1–11.6.Google Scholar
Oler, J. W. & Goldschmidt, V. W., 1982 A vortex-street model of the flow in the similarity region of a two-dimensional free turbulent jet. J. Fluid Mech. 123, 523–535.Google Scholar
Papailiou, D. D. & Lykoudis, P. S., 1974 Turbulent vortex streets and the entrainment mechanism of the turbulent wake. J. Fluid Mech. 62, 11–31.Google Scholar
Perry, A. E. & Chong, M. S., 1987 A description of eddying motions and flow patterns using critical-point concepts. Ann. Rev. Fluid Mech. 19, 125–155.Google Scholar
Perry, A. E. & Steiner, T. R., 1987 Large-scale vortex structures in turbulent wakes behind bluff bodies. Part 1. Vortex formation processes. J. Fluid Mech. 174, 233–270.Google Scholar
Rogallo, R. S. & Moin, P., 1984 Numerical simulation of turbulent flows. Ann. Rev. Fluid Mech. 16, 99–137.Google Scholar
Taneda, S.: 1959 Downstream development of the wakes behind cylinders. J. Phys. Soc. Japan 14, 843–848.Google Scholar
Thomas, F. O. & Goldschmidt, V. W., 1986 Structure characteristics of a developing turbulent plane jet. J. Fluid Mech. 163, 227–256.Google Scholar
Townsend, A. A.: 1979 Flow patterns of large eddies in a wake and in a boundary layer. J. Fluid Meck. 95, 515–537.Google Scholar
Wlezien, R. W.: 1981 The evolution of the low wavenumber structure in a turbulent wake. Ph.D. thesis, Illinois Institute of Technology.
Wygnanski, I., Champagne, F. & Marasli, B., 1986 On the large-scale structures in twodimensional, small-deficit, turbulent wakes. J. Fluid Mech. 168, 31–71.Google Scholar
Wygnanski, I. J. & Petersen, R. A., 1987 Coherent motion in excited free shear flows. AIAA J. 25, 201–213.Google Scholar