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为研究黄河口的水沙输移规律,采用基于无结构三角网格下的有限体积法建立了平面二维水沙数学模型.模型中分别采用不同方法处理粘性和非粘性沙的输移源项,并引入经验证的粘性沙输移源项改进公式.采用已有的概化水槽冲淤试验资料对模型进行了验证,然后应用于1982年6月至1983年5月期间黄河口水沙输移的数值模拟,计算得到的潮位过程及冲淤量与实测资料符合较好,结果表明模型能够较好地模拟考虑粘性沙运动的黄河口非均匀沙不平衡输移.最后比较了不同泥沙输移源项处理方式对模拟结果的影响,计算表明在黄河口水沙输移数值模拟中需要采用非均匀沙模型并同时考虑粘性和非粘性泥沙的输移.
In order to study the law of water and sediment transport in the Yellow River Estuary, a two-dimensional mathematical model of water and sediment was established by using the finite volume method based on unstructured triangular grids. Different methods were used to deal with the transport of viscous and non- And introduced the verified formula for improving the transport of viscous sand.It verified the model by using the existing generalized sinking and silting test data and then applied it to the sediment transport in the Yellow River Estuary from June 1982 to May 1983 Numerical simulations show that the calculated tidal level process and the amount of scour and deposition are in good agreement with the measured data, and the results show that the model can better simulate the unbalanced sand transport in the Yellow River estuary considering the viscous sand transport.Finally, The results show that the non-uniform sand model needs to be adopted in the numerical simulation of water and sediment transport in the Yellow River Estuary, and the transport of viscous and non-viscous sediments should be taken into account.