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J. Owen, P. Bearman, A. Szewczyk (2001)
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J. Wu, J. Sheridan, M. Welsh (1996)
Velocity Perturbations Induced by the Longitudinal Vortices in a Cylinder WakeJournal of Fluids Engineering-transactions of The Asme, 118
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A. Ahmed, B. Bays-Muchmore (1992)
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The three-dimensional near-wake structures behind a sinusoidal cylinder have been investigated using a particle image velocimetry (PIV) measurement technique at Re=3,000. The mean velocity fields and spatial distributions of ensemble-averaged turbulence statistics for flows around the sinusoidal and corresponding smooth cylinders were compared. The near-wake behind the sinusoidal cylinder exhibited pronounced spanwise periodic variations in the flow structure. Well-organized streamwise vortices with alternating positive and negative vorticity were observed along the span of the sinusoidal cylinder. They suppress the formation of the large-scale spanwise vortices and decrease the overall turbulent kinetic energy in the near-wake of the sinusoidal cylinder. The sinusoidal surface geometry significantly modifies the near-wake structure and strongly controls the three-dimensional vortices formed in the near-wake.
Experiments in Fluids – Springer Journals
Published: Apr 29, 2005
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