用控制体法进行河道洪水数值模拟

本文用控制体法从质量守恒和动量守恒原理出发导出计算河道洪水的基本方程式,为适应复杂的边界形状和河床地形,文中对非正交不规则形网格的应用和技巧作了论述。文中建议了一种非完全的稳格,以太子河某河段为算例和显格式计算结果作了对比。文中还论述了河道中有桥涵,道路,套堤等建筑物时的方法,对水位涨落过程中滩地出露的动边界计算问题的了论述。

Numerical Simulation for Flood in River by Volume Control Method (VCM)

This paper presents the Volume Control Method (VCM) and its application in flood simulation. In order to follow correctly the complex topography of river bed and geometry of boundary of the flow field, the techniques of irregular and non-orthogonal meshes are developed and proposed in present paper.A simple method of solving moving boundary problem is proposed.In case of existence of roadsand dikes in river the method of calculation has been studied.Both explicit and "non-normal" implicit schemes are used and comparison between them has been made.