【摘要】 采用σ坐标变换拟合复杂边界、VOF方法追踪自由水面变化和SIMPLE算法求解控制方程等建立垂向二维非恒定水流及悬浮物分布数学模型。该模型适用于变量在横向上分布基本均匀的水流流动特性及悬浮物扩散迁移过程的模拟,与刚盖假定或静水压强假定等条件下建立的垂向二维数学模型相比更符合实际情况。分别对概化水库水流结构的沿程变化、明渠均匀流及带有槽沟的明渠非均匀流及悬浮物浓度分布进行了模拟,计算结果与实测值符合良好。模型的应用可为河道或水库的洪水调度、水污染控制、取水工程优化等提供参考。更多还原

【Abstract】 Based on the σ-coordinate transformation to fit the complicated boundary,the VOF to track the moving free surface and the SIMPLE algorithm,this paper proposes a vertical 2D unsteady flow and suspended material distribution model.It is efficiency,and able to simulate flow characteristic and transportation process of suspended material in reservoirs and rivers for the comparative uniform of the variation distribution in lateral direction.And it has an advantage over the other models with hydrostatic pressure or rigid-lid assumption.By the numerical verification of the schematic reservoir,the open-channel and trench,the model proves its reliability and validity in simulating vertical 2D flow and the concentration distribution of the suspended material.It can also give a scientific reference to flood dispatching,water pollution control and the optimization of the water diversion project,etc.更多还原