Numerical Simulation on the Control of Drag Force and Vortex Formation by Different Wavy (Varicose) Cylinders

Lam, Kit; Lin, Yufeng

doi:10.1007/978-1-4020-6858-4_52

Kit Lam¹² &
Yufeng Lin¹²

Part of the book series: IUTAM Bookseries ((IUTAMBOOK,volume 7))

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Abstract

Large eddy simulations of turbulent flow around wavy cylinders are performed at Re=3000. The mean pressure distribution and mean streamwise velocity in the near-wake region are calculated and compared with those of a circular cylinder. The three-dimensional near-wake structures behind wavy cylinders were captured. It was found that due to the long vortex formation length resulting from the three-dimensional vortex sheet of the wavy cylinder, the mean drag coefficients of the wavy cylinders are less than that of a corresponding circular cylinder. A reduction of mean drag coefficient of up to 16% is obtained. Also, the fluctuating lift coefficients of the wavy cylinders are weakened significantly.

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Authors and Affiliations

Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
Kit Lam & Yufeng Lin

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Kit Lam
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Yufeng Lin
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Editors and Affiliations

Department of Aeronautics, Imperial College, London, England
J. F. Morrison , D. M. Birch & P. Lavoie , &

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Lam, K., Lin, Y. (2008). Numerical Simulation on the Control of Drag Force and Vortex Formation by Different Wavy (Varicose) Cylinders. In: Morrison, J.F., Birch, D.M., Lavoie, P. (eds) IUTAM Symposium on Flow Control and MEMS. IUTAM Bookseries, vol 7. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6858-4_52

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DOI: https://doi.org/10.1007/978-1-4020-6858-4_52
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6857-7
Online ISBN: 978-1-4020-6858-4
eBook Packages: EngineeringEngineering (R0)

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