| 摘要: |
| 合理的人工鱼礁组合可以有效改善投放水域的流场效应, 提高投放水域底层与上层水体之间的扰动。通过使用并行大涡模拟模式及被动示踪物模块, 并通过调整人工鱼礁布设间距, 研究了在不同背景流速条件(0.1、0.5、0.6和1.0 m/s)下, 在不同的横向间距(1L、2L、3L) (L表示人工鱼礁的边长)或纵向间距(1L、2L、3L、4L、5L)情况下, 方型人工鱼礁对上升流体积、营养盐的抬升和垂向涡黏系数的影响。研究结果表明, 在同一布置条件下, 单排布置下的三块人工鱼礁形成的上升流体积大小与来流速度成正相关, 体积随来流流速增加而增大6.4%~80.5%;在同一流速条件下, 上升流体积大小与纵向布置的间距成正比,与横向布置的间距成反比; 在横向布置条件下,当来流速度为1.0 m/s、布设间距为1L时,上升流体积参数最佳。总体来说, 上升流体积参数、示踪物浓度差和垂向涡黏性系数均显示横向布置优于纵向布置, 相较于布设间距, 来流速度是影响上升流体积最重要的因素。 |
| 关键词: 人工鱼礁 上升流 被动示踪物 垂向涡黏系数 |
| DOI：10.11693/hyhz20221000262 |
| 分类号:P731.26 |
| 基金项目:国家自然科学基金项目,41830533号,41876003号。 |
附件 |
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| SCHEME ANALYSIS OF UPWELLING EFFECTS IN ARTIFICIAL REEFS IN DIFFERENT LAYOUTS |
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CHENG Ze-Yi, YE Can, GAO Yu, SONG Jin-Bao, LI Shuang
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Ocean College, Zhejiang University, Zhoushan 316021, China
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| Abstract: |
| Reasonable artificial reef assemblage can effectively improve the flow field effect and increase the disturbance between the bottom and top waters in the reef area. Using parallel large eddy simulation model and passive tracer module and adjusting the artificial reef layout spacing, we studied the background flow conditions at velocities of 0.1, 0.5, 0.6, and 1.0 m/s in different lateral spacing (1L, 2L, 3L) (L is the side length of artificial reef) or longitudinal spacing (1L, 2L, 3L, 4L, 5L), from which the effects of square artificial reef on upwelling volume, nutrient uplift, and vertical vortex viscosity were investigated. The results show that under a same arrangement, the upwelling volume of the three artificial reefs in a single row is positively correlated with the incoming flow velocity, and the volume increases by 6.4%~80.5% with the increase of the incoming flow velocity. Under a same flow velocity, the upwelling volume is proportional to the spacing of longitudinal arrangement and inversely proportional to the spacing of transverse arrangement. In transverse arrangement, the upwelling volume parameter is the best when the incoming flow velocity is 1.0 m/s and the spacing is 1L. In general, the upwelling volume parameters, tracer concentration difference, and vertical vortex viscosity coefficient all show that lateral arrangement is superior to longitudinal arrangement. Compared with the layout spacing, the incoming flow velocity is the most important factor affecting the upwelling volume. |
| Key words: large eddy simulation artificial reef upwelling passive tracer vertical eddy viscosity |
