Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater
Floating breakwaters (FBs) play an important role in protecting coastlines, marine structures, and ports due to their simple construction, convenient movement, cost-effectiveness, and environmental friendliness. However, the traditional box-type FBs are flawed due to their requiring large sizes for...
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MDPI AG
2024-12-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/12/12/2269 |
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| author | Xuanqi Ruan Hongliang Qian Jingxuan Dai Feng Fan Shuang Niu |
| author_facet | Xuanqi Ruan Hongliang Qian Jingxuan Dai Feng Fan Shuang Niu |
| author_sort | Xuanqi Ruan |
| collection | DOAJ |
| description | Floating breakwaters (FBs) play an important role in protecting coastlines, marine structures, and ports due to their simple construction, convenient movement, cost-effectiveness, and environmental friendliness. However, the traditional box-type FBs are flawed due to their requiring large sizes for wave attenuation and their overly high level of wave reflection. In this paper, a novel partial T special-type FB with wave attenuation on the surface and flow blocking below the water has been presented. First, the User-Defined Function (UDF) feature in ANSYS Fluent was employed to compile the six degrees of freedom (6-DOF) motion model. A two-dimensional viscous numerical wave flume was developed using the velocity boundary wave-generation method and damping dissipation wave-absorption method, with fully coupled models of the FBs developed. A VOF multiphase flow model and a RANS turbulence model were employed to capture the free flow of gas–liquid two-phase flow. Then, the performance of wave attenuation of the new FB was compared with that of the traditional box-type FB of the same specifications. The simulation results showed that the transmission coefficient of the new FB is significantly lower than that of the box-type FB, and the dissipation coefficient is notably higher, demonstrating excellent performance of wave attenuation, particularly for long-period waves. As wave height increases, the novel FB benefits from its wave attenuation mechanism, with a lower reflection coefficient compared to the box-type FB. Finally, through parametric analysis, some design recommendations of the novel FB suitable for practical engineering applications in deep-sea aquaculture are presented. |
| format | Article |
| id | doaj-art-4f728fee6acb42fa8b89004906074f6f |
| institution | DOAJ |
| issn | 2077-1312 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-4f728fee6acb42fa8b89004906074f6f2025-08-20T02:43:32ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-12-011212226910.3390/jmse12122269Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating BreakwaterXuanqi Ruan0Hongliang Qian1Jingxuan Dai2Feng Fan3Shuang Niu4School of Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, ChinaSchool of Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, ChinaSchool of Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Ocean Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, ChinaFloating breakwaters (FBs) play an important role in protecting coastlines, marine structures, and ports due to their simple construction, convenient movement, cost-effectiveness, and environmental friendliness. However, the traditional box-type FBs are flawed due to their requiring large sizes for wave attenuation and their overly high level of wave reflection. In this paper, a novel partial T special-type FB with wave attenuation on the surface and flow blocking below the water has been presented. First, the User-Defined Function (UDF) feature in ANSYS Fluent was employed to compile the six degrees of freedom (6-DOF) motion model. A two-dimensional viscous numerical wave flume was developed using the velocity boundary wave-generation method and damping dissipation wave-absorption method, with fully coupled models of the FBs developed. A VOF multiphase flow model and a RANS turbulence model were employed to capture the free flow of gas–liquid two-phase flow. Then, the performance of wave attenuation of the new FB was compared with that of the traditional box-type FB of the same specifications. The simulation results showed that the transmission coefficient of the new FB is significantly lower than that of the box-type FB, and the dissipation coefficient is notably higher, demonstrating excellent performance of wave attenuation, particularly for long-period waves. As wave height increases, the novel FB benefits from its wave attenuation mechanism, with a lower reflection coefficient compared to the box-type FB. Finally, through parametric analysis, some design recommendations of the novel FB suitable for practical engineering applications in deep-sea aquaculture are presented.https://www.mdpi.com/2077-1312/12/12/2269floating breakwaterwave attenuation6-DOFVOFwave transmission coefficientwave reflection coefficient |
| spellingShingle | Xuanqi Ruan Hongliang Qian Jingxuan Dai Feng Fan Shuang Niu Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater Journal of Marine Science and Engineering floating breakwater wave attenuation 6-DOF VOF wave transmission coefficient wave reflection coefficient |
| title | Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater |
| title_full | Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater |
| title_fullStr | Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater |
| title_full_unstemmed | Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater |
| title_short | Numerical Study on the Wave Attenuation Performance of a Novel Partial T Special-Type Floating Breakwater |
| title_sort | numerical study on the wave attenuation performance of a novel partial t special type floating breakwater |
| topic | floating breakwater wave attenuation 6-DOF VOF wave transmission coefficient wave reflection coefficient |
| url | https://www.mdpi.com/2077-1312/12/12/2269 |
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