湖泊整治工程二维水沙数值模拟

A New Mathematical Model for Two Dimensional Flow and Sediment Transport

应用破开算子法原理，将平面二维不恒定流及泥沙扩散基本方程按不同的物理意义破成对流、扩散和传播三个子方程．基于三角形网格划分，利用有限体积守恒格式求解连续方程，用特征线方法求解对流方程并采用有限差分法求解扩散和传播方程，经数值实验及实际工程验证，该算法计算简便、边界符合良好，数值模拟精度也较高．

The basic equations for flow and sediment transport are split apart into three sets of comment equation,that is,convection,diffusion and propagation.It is based on triangle grids,uses body conservation to resolve successive equation and characteristic method to resolve convection equation and finite difference method to resolve diffusion and propagation equation.Many examinations show that the method is uncomplicated and has higher precision.