| 摘要: |
| 窄缝法作为动边界问题的一种处理方法,已被用于潮流及污染物扩散的数值模拟中,并取得了较好的效果。本文将窄缝法应用于悬沙输运数值计算中,推导出了考虑窄缝时的泥沙输运方程,建立了一种具有动边界功能的泥沙输运模型。计算结果与实测值吻合较好,表明该模型在模拟河口区悬沙输运方面是正确可行的。 |
| 关键词: 窄缝法 悬沙输运 数值模拟 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目，40076026号 |
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| APPLICATION OF THE SLOT METHOD IN NUMERICAL MODELING OF SUSPENDED SEDIMENT TRANSPORT IN ESTUARIES |
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SUN Qi, SUN Xiao Gong, LI Rui Jie
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College of Marine Geosciences, Ocean University of Qingdao, Qingdao, 266003
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| Abstract: |
| The slot method is effective in dealing with the problem of moving boundary. It has been applied to numerical simulation of tidal motion and pollutant diffusion. In this paper, the method is applied to compute the transport of suspended sediment. A new sand transport equation which can simulate the moving boundary is founded using the slot method. The computational results are in good agreement with in situ data. The main conclusions are as follows:
1. The slot method can be used to simulate the trend of suspended sediment transport in estuaries.
2. The slot coefficient ε affects the accuracy of the computational result. In theory, the smaller the slot coefficient ε is, the more accurate the result is. How ever, if ε is too small, it may lead to overflow.
3. Z0 does not affects the accuracy of the computational result much. However, if it is not properly chosen, it may lead to overflow.
4. The slot method is very effective and should be applied to three-dimensional numerical modeling. |
| Key words: Slot method, Transportation of the suspended sediment, Numerical simulation |
