JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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Numerical investigation of the flow pattern around a vertical cylinder under wave action

Author(s): Ben HE¹, Junkang WENG², Yuan LIN², Yifan GAO¹, Maoxing WEI², Fang HE²
Affiliation(s): ¹PowerChina HuaDong Engineering Co., Ltd, Hangzhou 311100, China ²Ocean College, Zhejiang University, Zhoushan 316021, China
Corresponding email(s): Fang HE, hefang@zju.edu.cn
Key Words: Horseshoe vortex; Pressure distribution; Keulegan-Carpenter number; Vortex strength; Bed shear stress

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Ben HE¹, Junkang WENG², Yuan LIN², Yifan GAO¹, Maoxing WEI², Fang HE². Numerical investigation of the flow pattern around a vertical cylinder under wave action[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2500436

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author="Ben HE¹, Junkang WENG², Yuan LIN², Yifan GAO¹, Maoxing WEI², Fang HE²",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2500436"
}

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%A Ben HE¹
%A Junkang WENG²
%A Yuan LIN²
%A Yifan GAO¹
%A Maoxing WEI²
%A Fang HE²
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2500436"

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T1 - Numerical investigation of the flow pattern around a vertical cylinder under wave action
A1 - Ben HE¹
A1 - Junkang WENG²
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A1 - Yifan GAO¹
A1 - Maoxing WEI²
A1 - Fang HE²
J0 - Journal of Zhejiang University Science A
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Y1 - in press
PB - Zhejiang University Press & Springer
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doi="https://doi.org/10.1631/jzus.A2500436"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: The interaction between vertical cylinders and waves is an important research problem due to the prevalence of cylinder-type structures in marine infrastructure. A major goal is to improve their design for greater stability in the presence of waves. In this study we numerically investigate the formation of vortices around a vertical cylinder under wave action, emphasizing the role of the flow field in potential bed erosion. Surface pressure distribution analysis elucidates the generation and evolution of the vortices, while the spatial distributions of bed shear stress quantify the significant influence of the flow field and vortex dynamics on scour around the cylinder. Numerical simulations were performed over a range of Keulegan-Carpenter (KC) numbers (12 to 26) to systematically resolve the three-dimensional flow structures. Validation against Particle Image Velocimetry (PIV) data confirms the accuracy of these simulations. Our results show that both the strength and spatial extent of the horseshoe vortex increase markedly with increasing KC number, leading to intensified bed shear stress and elevated scour potential around the cylinder.

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