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Simulation of a jet under the combined action of waves and currents using a momentum integral model
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Yongping Chen1, 2, Xingfei Li1, 2, Shuqiao Fang3, 4, Zhenshan Xu1, 2, Yuhang Chen1, 2, Otoo Ebenezer1, 2
Haiyang Xuebao | 2024, 46(2) : 1 - 13
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Haiyang Xuebao | 2024, 46(2): 1-13
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Simulation of a jet under the combined action of waves and currents using a momentum integral model
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Yongping Chen1, 2, Xingfei Li1, 2, Shuqiao Fang3, 4, Zhenshan Xu1, 2, Yuhang Chen1, 2, Otoo Ebenezer1, 2
Affiliations
  • 1. The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
  • 2. College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
  • 3. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
  • 4. Key Laboratory of Ocean Space Resource Management Technology, Ministry of Natural Resources, Hangzhou 310012, China
Published: 2024-02-29 doi: 10.12284/hyxb2024025
Outline
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Wastewater is usually discharged into the sea in the form of jet, and its dilution process is the result of the interaction of jet, wave and tidal current. In this study, based on the reasonable assumptions, the governing equations are integrated to the form of ordinary differential equations. According to the hydrodynamic characteristics of the jet in the wavy current environment, the entrainment and drag force functions of the jet are introduced to close the governing equations, thus the integral model for the turbulent jet under the combined action of waves and currents is established. Through comparison and verification, it is confirmed that the integral model can accurately simulate the time average movement and dilution process of the near-field jet under the wavy current environment. It is found that compared with a pure current environment, the influence range of jet on the surrounding water is larger than that in a wavy current environment, and the dilution capacity of jet can be remarkably enhanced by the wave effect. Based on the momentum integral simulation results, the empirical fitting formulas for the position of the jet cross-sectional trajectory line and the minimum dilution in the wavy current environment are established. The developed model could be served as an efficient and accurate tool to assess the environmental impacts of submarine outfalls on the surrounding waters.

combined wave and current environment  /  turbulent jet  /  momentum integral simulation  /  jet trajectory  /  dilution
Yongping Chen, Xingfei Li, Shuqiao Fang, Zhenshan Xu, Yuhang Chen, Otoo Ebenezer. Simulation of a jet under the combined action of waves and currents using a momentum integral model[J]. Haiyang Xuebao, 2024 , 46 (2) : 1 -13 . DOI: 10.12284/hyxb2024025
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Year 2024 volume 46 Issue 2
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Article Info
doi: 10.12284/hyxb2024025
  • Receive Date：2023-01-09
  • Online Date：2025-11-25
  • Published：2024-02-29
Article Data
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History
  • Received：2023-01-09
  • Revised：2023-09-21
Funding
Affiliations
    1. The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China
    2. College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
    3. Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
    4. Key Laboratory of Ocean Space Resource Management Technology, Ministry of Natural Resources, Hangzhou 310012, China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
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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