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Volume 8,     Number 3,     Fall 2000

 

A STUDY OF TWO-DIMENSIONAL ASPECTS OF VORTEX SHEDDING FROM A BLUFF BODY UNDER TRANSVERSE OSCILLATIONS
SERPIL KOCABIYIK

Abstract. In this paper we describe a detailed study of the near wake structures associated with simulated two dimensional flow past a circular cylinder that is in simple harmonic cross-flow oscillation. Results are examined for R = 103 and a fixed motion amplitude of nondimensional oscillatory velocity α = 1.5. The study concentrates on the forced oscillation frequency to Kármán vortex shedding frequency ratios between 1.25 and 5.0. The object of the study is to examine the effect of increase of forced oscillation frequency on the near-wake structure. Time-periodic states with asymmetric wake structures and the change in phase of vortex shedding is observed with the increase of forced oscillation frequency.

 

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© 2005, Canadian Applied Mathematics Quarterly (CAMQ)