考虑植物影响的波浪和波生流迭加条件下水动力特性数值模拟研究

发布时间：2018-06-05 01:11

本文选题：湿地植被 + 波浪模型　；参考：《海洋工程》2017年05期

【摘要】：海岸湿地是近海地区重要的生态系统,由于潮流、波浪尤其是非连续水流与植被的相互作用,导致该海域的水动力环境复杂多变。本文发展了一个深度平均二维波流耦合数学模型,模拟湿地海域波浪和波生沿岸流的运动特性。水动力模型中植物拖曳力作为源项放入动量方程中,在波浪作用量平衡方程增加波能耗散项用于解释水生植物对波浪产生的阻力作用。在动态耦合模型中,波浪模型为潮流模型提供波浪辐射应力、波高、波浪周期等数据信息,潮流模型为波浪模型提供计算的水位和流速,可以达到双向动态耦合。本文发展的波流耦合模型通过三个实验室试验数据加以验证,计算结果和实验数据吻合较好,在波浪、波生流和植物迭加条件下,所建模型能够有效地模拟波浪、沿岸流等不同现象。
[Abstract]:Coastal wetland is an important ecosystem in offshore area. Because of the interaction between tidal current, wave, especially discontinuous current and vegetation, the hydrodynamic environment in this sea area is complex and changeable. In this paper, a depth average 2-D coupled mathematical model is developed to simulate the motion characteristics of waves and wave-induced coastal currents in wetland waters. In the hydrodynamic model, the plant drag force is put into the momentum equation as the source term, and the wave energy dissipation term is added to the wave action balance equation to explain the resistance of aquatic plants to the wave. In the dynamic coupling model, the wave model provides the wave radiation stress, wave height, wave period and other data information for the tidal current model, and the tidal current model provides the calculated water level and velocity for the wave model, which can achieve bidirectional dynamic coupling. The coupled wave-current model developed in this paper is verified by three laboratory experimental data. The calculated results are in good agreement with the experimental data. Under the conditions of wave, wave-induced currents and plant superposition, the model can effectively simulate the waves. Different phenomena such as coastal currents.
【作者单位】：大连海洋大学海洋科技与环境学院;盘锦鸳鸯沟国家级海洋公园管理办公室;国家海洋环境监测中心;
【基金】：国家自然科学基金资助项目(51579030) 盘锦红海滩湿地退化与生态修复资助项目(PHL-XZ-2017013-002) 辽宁省自然科学基金资助项目(2014020148) 水力学与山区河流国家重点实验室资助项目(SKHL1517)
【分类号】：P731.2

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