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http://dx.doi.org/10.3795/KSME-B.2005.29.11.1199

A Study on Characteristics of the Flow Around Two Square Cylinders in a Tandem Arrangement Using Particle Image Velocimetry  

Kim, Dong-Keon (부산대학교 기계기술연구소)
Lee, Jong-Min (한국델파이(주))
Seong, Seung-Hak (부산대학교 기계공학부)
Yoon, Soon-Hyun (부산대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.29, no.11, 2005 , pp. 1199-1208 More about this Journal
Abstract
The flow fields including velocities, turbulence intensities, Reynolds shear stress and turbulent kinetic energy were investigated using particle image velocimetry(PIV) to study the flow characteristics around two square cylinders in a tandem arrangement. The experiments were carried out in the range of the spacing from 1.0 to 4.0 widths of cylinder, Reynolds number of 5.3$\times$10$^{3}$ and 1.6$\times$10$^{4}$ respectively. Discontinuous jumping at the drag coefficient variation was found for two cylinders simultaneously when the spacing between two cylinders is varied. This phenomenon is attributed to a sudden change of the flow pattern which depends on the reattachment of the shear layer separated from the upstream cylinder. Near such a critical spacing, the changes of the flow fields as well as the effect of Reynolds number were studied in detail.
Keywords
Square Cylinder; Particle Image Velocimetry; Mean Flow Field; Separated Shear Layer; Reattachment; Vortex Shedding; Strouhal Number; Tandem Arrangement;
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  • Reference
1 Chen, J. M. and Liu, C. H., 1999, 'Vortex Shedding and Surface Pressures on a Square Cylinder at Incidence to a Uniform Air Stream,' J. Heat & Fluids Flow, Vol. 20, pp. 592-597   DOI   ScienceOn
2 Okajima, A., 1982, 'Strouhal Numbers of Rectangular Cylinders,' J. Fluid Mech., Vol. 123, pp. 379-398   DOI   ScienceOn
3 Mahbub, MD. Moriya, M. Sakamoto, H. and Takki, K., 2002, 'Suppression of Fluid Forces Acting on Two Square Prisms in a Tandem Arrangement by Passive Control of Flow,' J. Fluids & Structures, Vol. 16, No. 8, pp. 1073-1092   DOI   ScienceOn
4 Chen, J. M. and Liu, C. H., 2002, 'Observations of Hysteresis in Flow Around Two Square Cylinders in a Tandem Arrangement,' J. Wind Eng & Ind. Aerodyn., Vol. 90, pp. 1019-1050   DOI   ScienceOn
5 Havel, B. and Martinuzzi, R. J., 2004, 'Vortex Shedding from Two Surface-Mounted Cubes in Tandem,' J. Heat & Fluids Flow, Vol. 25, pp. 364-372   DOI   ScienceOn
6 Bradshaw, P., 1968, 'An Instruction to Turbulence and Its Measurement,' Pergamon Press
7 Chiu, A. Y. W. Ko, N. W. M. and Wong, P. T. Y., 1995, 'Flow Characteristics Around Two Parallel Adjacent Square Cylinders of Different Sizes,' J. Wind Eng & Ind. Aerodyn., Vol. 54/55, pp. 263-275   DOI   ScienceOn
8 Gu, Z. F. and Sun, T. F., 1995, 'Interference Between Wind Loading on Group of Structures,' J. Wind Eng & Ind. Aerodyn., Vol. 54/55, pp. 213-225
9 Hangan, H. and Vickery, B. J., 1999, 'Buffeting of Two-Dimensional Bluff Bodies,' J. Wind Eng & Ind. Aerodyn., Vol. 82, pp. 173-187   DOI   ScienceOn
10 Hangan, H., Havel, B. and Martinuzzi, R., 2001, 'Buffeting for 2D and 3D Sharp-Edged Bluff Bodies,' J. Wind Eng & Ind. Aerodyn., Vol. 89, pp. 1369-1381   DOI   ScienceOn
11 Haniu, H., Obata, Y. and Sakamoto, H., 1987, 'Fluctuating Forces Acting on Two Square Prisms In a Tandem Arrangement,' J. Wind Eng & Ind. Aerodyn., Vol. 26, pp. 85-103   DOI   ScienceOn
12 Haniu, H. and Sakamoto, H., 1988, 'Effect of Free-Stream Turbulence on Characteristics of Fluctuating Forces Acting on Two Square Prisms in Tandem Arrangement,' Transaction of ASME, Vol. 110, pp. 140-146   DOI