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从水动力和泥沙运动方程出发,采用雷诺时均的N-S方程,以k-ε双方程模型对紊流方程进行封闭,采用垂向分层的方法建立桥梁墩台冲刷的三维水动力模型。泥沙计算考虑悬移质和推移质泥沙输运,通过求解动网格方程更新整个计算域的网格坐标。通过数值模拟结果与模型试验结果的比较,建立的桥梁墩台冲刷数值模型具有较高的精度。
Based on the equations of hydrodynamics and sediment transport, the turbulence equations are closed by the Reynolds-averaged N-S equation and the k-ε two-equation model. The vertical stratification method is used to establish the three-dimensional hydrodynamic model. Sediment calculation considers suspended sediment transport and suspended sediment transport. The grid coordinates of the entire computational domain are updated by solving the moving grid equation. Through comparison between the numerical simulation results and the model test results, the numerical model of pier and abutment erosion is established with high precision.