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Suppression of vortex-induced vibration of a circular cylinder by Lorentz force

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Abstract

The electro-magnetic control of vortex-induced vibration (VIV) of a circular cylinder is investigated numerically in the exponential-polar coordinates attached on the moving cylinder for Re=150 in the paper. Compared with the fixed cylinder, the vibration of cylinder leads to the shift of stagnation point, the shear layer strength and the inertial force, which affects the hydrodynamic forces on the cylinder. The effects of the instantaneous wake geometries and the corresponding cylinder motion on the hydrodynamic forces for one entire period of vortex shed are discussed in the drag-lift phase diagram. The Lorentz force for controlling the vibration cylinder is classified into the field Lorentz force and the wall Lorentz force. The field Lorentz force decreases the lift oscillation, and in turn, suppresses the VIV, whereas the wall Lorentz force has no effect on the lift.

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Authors and Affiliations

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

    Hui Zhang, BaoChun Fan & HongZhi Li

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  1. Hui Zhang
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  2. BaoChun Fan
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  3. HongZhi Li
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Correspondence to BaoChun Fan.

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Zhang, H., Fan, B. & Li, H. Suppression of vortex-induced vibration of a circular cylinder by Lorentz force. Sci. China Phys. Mech. Astron. 54, 2248–2259 (2011). https://doi.org/10.1007/s11433-011-4532-5

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  • DOI: https://doi.org/10.1007/s11433-011-4532-5

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