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Vanishing of Three-Dimensionality in the Wake Behind a Rotationally Oscillating Circular Cylinder

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Abstract

The flow behind a three-dimensional rotationally oscillating circular cylinder was studied by a numerical method. The computations were performed at a Reynolds number of 260, which is at a level that the flow wake has developed into a three-dimensional state called Mode-B. The purpose of this paper is to examine the influence of various rotational amplitudes (0.1–0.7) on the wake instability of the flow, while the oscillation frequency is fixed to the value of that measured in the wake of a stationary cylinder. The results show that the rotation with sufficiently high amplitude brings the flow back to its nominal two-dimensional state. Moreover, it is found that the value of the time-averaged drag and the RMS value of the lift are larger than those of a stationary circular cylinder.

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Authors and Affiliations

  1. State key Laboratory of Fluid Power Transmission and Control, Department of Mechanics, Zhejiang University, Hangzhou, 310027, China

    Jian Deng, Xue-ming Shao & An-lu Ren

Authors
  1. Jian Deng
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  2. Xue-ming Shao
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  3. An-lu Ren
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Correspondence to Jian Deng.

Additional information

Project supported by the National Natural Science Foundation of China (Grant No. 10472104) and the National Basic Research Program of China (973 Program, Grant No.2006CB705400).

Biography: DENG Jian (1981-), Male, Ph. D., Lecturer

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Deng, J., Shao, Xm. & Ren, Al. Vanishing of Three-Dimensionality in the Wake Behind a Rotationally Oscillating Circular Cylinder. J Hydrodyn 19, 751–755 (2007). https://doi.org/10.1016/S1001-6058(08)60013-X

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  • DOI: https://doi.org/10.1016/S1001-6058(08)60013-X

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