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Underlay mechanism in lift-drag phase diagrams for shear flow over cylinder

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Abstract

The characteristics of a uniform-shear flow over a circular cylinder are investigated numerically by using the alternative-direction implicit (ADI) algorithm and a fast Fourier transform (FFT) one in the exponential-polar coordinates for Re=150 and 0⩽K ⩽ 0.46. The diagram of lift-drag phase, implying the detail information about the fluctuations of drag and lift as well as the flow patterns in the wake and fluctuating pressure on the cylinder surface, is used to describe the effects of the shear rate on the flow. Results show that the upper (or lower) closed curve of a phase diagram corresponds to the first (or second) half shedding cycle. The lift-drag phase diagram will move down-left with the increase of shear rate K such that the lift is exerted from the upper side to the lower side, and the drag on the first half shedding cycle is smaller than that on the second half.

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Authors and Affiliations

  1. Science and Technology of Transient Physics Laboratory, Nanjing University of Science and Technology, Nanjing, 210094, P.R. China

    Hui Zhang  (张 辉), Bao-chun Fan  (范宝春), Zhi-hua Chen  (陈志华) & Yan-ling Li  (李艳玲)

Authors
  1. Hui Zhang  (张 辉)
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  2. Bao-chun Fan  (范宝春)
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  3. Zhi-hua Chen  (陈志华)
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  4. Yan-ling Li  (李艳玲)
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Corresponding author

Correspondence to Bao-chun Fan  (范宝春).

Additional information

Project supported by the National Natural Science Foundation of China (Nos. 11202102 and 11172140) and the Specialized Research Fund for Doctoral Program of High Education (No. 20123219120050)

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Zhang, H., Fan, Bc., Chen, Zh. et al. Underlay mechanism in lift-drag phase diagrams for shear flow over cylinder. Appl. Math. Mech.-Engl. Ed. 35, 221–228 (2014). https://doi.org/10.1007/s10483-014-1785-8

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  • DOI: https://doi.org/10.1007/s10483-014-1785-8

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2010 Mathematics Subject Classification

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