Numerical simulation of wave resonance in the narrow gap between two non-identical boxes

OCEAN ENGINEERING

卷:156

Article

Jiang, Sheng-Chao^1,2  Bai, Wei³  Tang, Guo-Qiang⁴ 

[1] Dalian Univ Technol, Sch Naval Architecture, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

[2] Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, Shanghai 200240, Peoples R China

[3] Manchester Metropolitan Univ, Sch Comp Math & Digital Technol, Chester St, Manchester M1 5GD, Lancs, England

[4] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China

关键词: Wave resonance;    Narrow gap;    Energy dissipation;    Energy transformation;    Non-identical boxes;    OpenFOAM (R);   

DOI  :  10.1016/j.oceaneng.2018.02.055

来源: Elsevier

【 摘 要 】

Wave resonance in the narrow gap between two side-by-side non-identical boxes is investigated by employing a two-dimensional numerical wave flume based on the OpenFOAM (R) package. The focus of this study is to examine the influence of the energy transformation and the energy dissipation on the hydrodynamic behavior of wave response around resonant conditions. Numerical simulations show that the unrealistic wave resonant responses in the narrow gap by the linear potential flow model are due to not only the energy dissipation induced by the fluid rotational motion, but also the energy transformation associated with the free surface. With the increase of incident wave amplitude, relatively more energy is reflected, leading to the decrease of wave resonant response and energy dissipation in the narrow gap at the resonant frequency. When slightly away from the resonant frequency, the energy dissipation becomes the dominant factor for the decrease of wave response in the narrow gap with increasing the incident wave amplitude. As for the influence of gap configuration, on one hand, energy dissipation has the dominant effect for the typical case of small upstream and large downstream box drafts. On the other hand, the reflected energy is more important for the typical large upstream and small downstream box drafts. More resonant fluid exists in the gap with the increase of gap breadth, leading to the decrease of reflection coefficient and the increase of transmission coefficient.

【 授权许可】

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