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采用计算流体力学领域中的新技术建立了双戗堤进占截流的数学模型 .用适体坐标技术克服天然河道复杂的几何边界给有限差分法所带来的困难 ;用交替方向隐式有限差分格式求解变换平面上的偏微分方程 ;用动边界技术处理河床的淹露 .该模型已用于预测三峡工程截流过程中的水力特性 ,计算结果与实验数据吻合较好
The mathematical model of double-bank embankment closure was established by using the new technology in computational fluid dynamics (CFD). The problem of finite difference method was solved by the method of apical coordinate technique to overcome the complicated geometric boundary of natural channel. By using alternating direction implicit finite difference scheme Solving the partial differential equations on the transformation plane and using the dynamic boundary technique to deal with the riverbed flooding.The model has been used to predict the hydraulic characteristics during the closure of the Three Gorges Project.The calculated results are in good agreement with the experimental data