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基于RANS模型的珊瑚礁-潟湖-口门系统波生水平环流特性的数值模拟研究

王志亮1, 姚宇1,2，周婷1,2, 曾玉仁1, 蒋昌波1,2   

  1. 1.长沙理工大学水利与海洋工程学院, 湖南 长沙 410114;

    2.水沙科学与水灾害防治湖南省重点实验室, 湖南 长沙 410114



  • 收稿日期:2026-03-04 修回日期:2026-04-10 接受日期:2026-04-22
  • 通讯作者: 姚宇
  • 基金资助:

    国家自然科学基金项目(52471267, 52479063)

Numerical investigation of wave-induced horizontal circulation in a reef-lagoon-channel system based on the RANS model

WANG Zhiliang1, YAO Yu1,2, ZHOU Ting1,2, ZENG Yuren1, JIANG Changbo1,2   

  1. 1. School of Hydraulic and Ocean Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, PR China;

    2. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha, Hunan, 410114, PR China



  • Received:2026-03-04 Revised:2026-04-10 Accepted:2026-04-22
  • Contact: YAO, YU
  • Supported by:
     National Natural Science Foundation of China (52471267, 52479063)

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摘要： 本文基于不可压缩雷诺平均纳维-斯托克斯（RANS）方程，结合k-ω SST湍流模型与流体体积（VOF）方法，建立了规则波作用下珊瑚模型礁-潟湖-口门系统波生环流的数值模型。将数值模拟结果与已报道文献中的港池物理模型实验实测流速数据进行对比，验证了模型的可靠性。在此基础上，系统研究了多个珊瑚礁地形参数（礁坪高程、潟湖宽度、潟湖水深、口门宽度和口门水深）对波浪传播变形及波生水平环流的影响。结果表明，礁坪上存在由波浪增水梯度驱动的向岸流和沿岸流，并形成二维水平环流。礁坪上波浪增水随着礁坪高程、潟湖宽度减小而减小，但对口门宽度及潟湖水深变化不敏感。波生环流强度主要受礁坪高程、潟湖宽度、口门宽度与口门水深调控，受潟湖水深影响较小：随礁坪高程减小，向岸流先增强后减弱，而沿岸流持续增强；潟湖宽度增加或口门水深变浅，沿岸流增强而向岸流减弱；口门宽度增加，向岸流与沿岸流均先增强后减弱。研究还发现，尽管各控制断面流量会随地形参数变化而存在细微差异，但系统内总流量始终保持动态平衡。本研究揭示了关键地形参数对珊瑚礁-潟湖-口门系统波生环流过程的调控机制，可为珊瑚礁海岸带的生态保护与工程防护提供科学依据。

关键词: 规则波, 波生环流, 纳维-斯托克斯方程, 珊瑚礁

Abstract: Based on the incompressible Reynolds-Averaged Navier-Stokes (RANS) equations coupled with thek-ω SSTturbulence closure and the Volume of Fluid (VOF) method, a numerical model is established in this study to simulate wave-induced circulation in an idealized reef-lagoon-channel system under monochromatic wave conditions. The model is validated by comparing numerical results with measured flow velocity data from physical basin experiments reported in the literature. Subsequently, a systematic investigation is conducted to examine the effects of reef platform elevation, lagoon width and water depth, as well as channel width and water depth on wave transformation and horizontal wave-induced circulation. The results indicate that wave setup on the reef flat drives shoreward and alongshore currents, forming a two-dimensional horizontal circulation. Wave setup decreases with reductions in reef flat elevation and lagoon width, but shows little sensitivity to variations in channel width and lagoon water depth. Specifically, as reef flat elevation decreases, the shoreward current initially intensifies then weakens, whereas the alongshore current strengthens consistently. Increasing lagoon width or decreasing channel water depth enhances the alongshore current but weakens the shoreward current. An increase in channel width causes both the shoreward and alongshore currents to first increase and then decrease. Although minor variations in flow rates at individual control sections occur with changes in topographic parameters, the total flow rate within the system remains dynamically balanced. This study elucidates the regulatory mechanisms of key morphological parameters on wave-induced circulation in coral reef-lagoon-channel systems, providing scientific insights for ecological conservation and coastal engineering in coral reef environments.

Key words: Monochromatic waves, wave-induced current, Navier-Stokes equations, Coral reefs