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A ghost cell method for simulating flows around twin moving cylinders at a staggered arrangement
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Fu-long SHI1, 2, Chuan-zhong OU1, Jian-jian XIN3, Hong-xin LI1, Yi-da MAO1
Journal of Ship Mechanics | 2025, 29(3) : 436 - 450
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Journal of Ship Mechanics | 2025, 29(3): 436-450
• Hydrodynamics •
A ghost cell method for simulating flows around twin moving cylinders at a staggered arrangement
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Fu-long SHI1, 2, Chuan-zhong OU1, Jian-jian XIN3, Hong-xin LI1, Yi-da MAO1
Affiliations
  • 1.School of Shipping and Naval Arechitecture, Chongqing Jiaotong University, Chongqing 400074, China
  • 2.CSSC Haizhuang Windpower Co., Ltd., Chongqing 400074, China
  • 3.Institute of Naval Architecture and Ocean Engineering, Ningbo University, Ningbo 315211, China
Published: 2025-03-20 doi: 10.3969/j.issn.1007-7294.2025.03.009
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A marine riser usually works in the form of multiple riser clusters. The hydrodynamic interference characteristics between adjacent risers are obviously seen, and the interference can accelerate the fatigue damage. Therefore, it is meaningful to investigate the vortex-shedding patterns and the hydrodynamic interference characteristics of twin cylinders in order to ensure safe operation of risers. This study was aimd to parametrically investigate flows around twin moving cylinders at a staggered arrangement by a ghost cell method, in which, the incompressible Navier-Stokes equations were solved on a Cartesian staggered grid by using an in-house developed time semi-implicit finite difference method. A ghost cell method was used to enforce the no-slip boundary conditions. A radial basis iso-surface function was used to track the moving boundary implicitly and identify the properties of background grid. Based on the present numerical model, flows around twin forced moving cylinders at a staggered arrangement were simulated. Vortex patterns and force coefficients were analyzed under different gaps and oscillation frequencies. Typical interference phenomena such as synchronized, deflected and merged vortex patterns were observed. The results can provide theoretical guidance for the arrangement optimization of the riser clusters.

ghost cell method  /  moving boundary  /  twin cylinders flow  /  vortex shedding
Fu-long SHI, Chuan-zhong OU, Jian-jian XIN, Hong-xin LI, Yi-da MAO. A ghost cell method for simulating flows around twin moving cylinders at a staggered arrangement[J]. Journal of Ship Mechanics, 2025 , 29 (3) : 436 -450 . DOI: 10.3969/j.issn.1007-7294.2025.03.009
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Year 2025 volume 29 Issue 3
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Article Info
doi: 10.3969/j.issn.1007-7294.2025.03.009
  • Receive Date：2024-09-24
  • Online Date：2026-03-24
  • Published：2025-03-20
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  • Received：2024-09-24
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Affiliations
    1.School of Shipping and Naval Arechitecture, Chongqing Jiaotong University, Chongqing 400074, China
    2.CSSC Haizhuang Windpower Co., Ltd., Chongqing 400074, China
    3.Institute of Naval Architecture and Ocean Engineering, Ningbo University, Ningbo 315211, China
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表12种不同金属材料的力学参数
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Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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