Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets
Wave attenuation for the purpose of coastal protection has been an important topic in coastal engineering. Wave attenuation in relation to the vortices induced by a solitary-like wave propagating over submerged breakwaters (BWs) is discussed in this paper. A series of hydraulic model experiments was...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/8/11/834 |
| _version_ | 1797550127185920000 |
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| author | Chi-Yu Li Ruey-Syan Shih Wen-Kai Weng |
| author_facet | Chi-Yu Li Ruey-Syan Shih Wen-Kai Weng |
| author_sort | Chi-Yu Li |
| collection | DOAJ |
| description | Wave attenuation for the purpose of coastal protection has been an important topic in coastal engineering. Wave attenuation in relation to the vortices induced by a solitary-like wave propagating over submerged breakwaters (BWs) is discussed in this paper. A series of hydraulic model experiments was conducted to investigate the occurrence of eddies, the types and combinations of submerged BWs, and related phenomena of the range expansion of vortices. The microscopic changes in the flow field, the variation of eddies, and the distributions of streamlines were analyzed using the particle image velocimetry (PIV) technique. The measured transmission and reflection coefficients, along with the concept of energy conservation, were also examined to support the results. The results indicate that the attenuated wave energy is related to the induced vortices, and show that the total relative vortex energy for rectangular submerged BWs is larger than that for undulating submerged BWs in both the single and composite sets. The magnitude of the maximum vorticity of the undulating BW sets is larger and more concentrated than that of the rectangular BW sets; however, the total vortex energy is slightly smaller owing to the narrower vortex area range. |
| first_indexed | 2024-03-10T15:25:06Z |
| format | Article |
| id | doaj.art-e74065ddb7e34bbdad6250a5375d26f2 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T15:25:06Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-e74065ddb7e34bbdad6250a5375d26f22023-11-20T18:12:08ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-10-0181183410.3390/jmse8110834Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater SetsChi-Yu Li0Ruey-Syan Shih1Wen-Kai Weng2Bachelor Degree Program in Ocean Engineering and Technology, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, TaiwanWave attenuation for the purpose of coastal protection has been an important topic in coastal engineering. Wave attenuation in relation to the vortices induced by a solitary-like wave propagating over submerged breakwaters (BWs) is discussed in this paper. A series of hydraulic model experiments was conducted to investigate the occurrence of eddies, the types and combinations of submerged BWs, and related phenomena of the range expansion of vortices. The microscopic changes in the flow field, the variation of eddies, and the distributions of streamlines were analyzed using the particle image velocimetry (PIV) technique. The measured transmission and reflection coefficients, along with the concept of energy conservation, were also examined to support the results. The results indicate that the attenuated wave energy is related to the induced vortices, and show that the total relative vortex energy for rectangular submerged BWs is larger than that for undulating submerged BWs in both the single and composite sets. The magnitude of the maximum vorticity of the undulating BW sets is larger and more concentrated than that of the rectangular BW sets; however, the total vortex energy is slightly smaller owing to the narrower vortex area range.https://www.mdpi.com/2077-1312/8/11/834particle image velocimetrysolitary wavesubmerged obstacleundulating breakwaterrectangular breakwatervortex energy |
| spellingShingle | Chi-Yu Li Ruey-Syan Shih Wen-Kai Weng Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets Journal of Marine Science and Engineering particle image velocimetry solitary wave submerged obstacle undulating breakwater rectangular breakwater vortex energy |
| title | Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets |
| title_full | Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets |
| title_fullStr | Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets |
| title_full_unstemmed | Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets |
| title_short | Visualization Investigation of Energy Dissipation Induced by Eddy Currents for a Solitary-Like Wave Passing over Submerged Breakwater Sets |
| title_sort | visualization investigation of energy dissipation induced by eddy currents for a solitary like wave passing over submerged breakwater sets |
| topic | particle image velocimetry solitary wave submerged obstacle undulating breakwater rectangular breakwater vortex energy |
| url | https://www.mdpi.com/2077-1312/8/11/834 |
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