摘要
采用平面二维水动力学模型来描述串流洪水运动,将降雨直接产流与坡面流的影响分别以面源及旁侧入汇的形式融入水动力学模型;基于曲线网格对串流区洪水运动数学模型的控制方程进行了离散,同已有的离散方法相比,本方法不需要对控制方程进行坐标变换,因而离散方程形式简单,物理概念清晰,且适用于一般曲线网格,对复杂区域适应能力较强;采用北汝河串流区1943年历史洪水资料进行了验证计算,验证计算所得洪痕水位与调查成果基本一致,说明所建立的数学模型能够较为准确地描述串流区内的水流运动.
The fork-conflux flood flow movement in rivers was investigated for it is a noticeable complex problem in planning and designing engineering projects.The main works and conclusions are as follows.（1） A depth-averaged mathematical model was employed to simulate the flood flow in plain rivers in which the effects of rainfall and runoff on slope caused by it were taken into consideration as non-point source and lateral-inflow respectively.（2） A numerical method was introduced to solve the governing equations with curvilinear grid.Compared with the previous method,the governing equations need not be transformed into the curvilinear coordinates as before;and the algorithm can be applied to either orthogonal curvilinear grids or general curvilinear grids,which makes the algorithm more adaptable to complicated boundary.（3） The investigated data of the flood of Beiru Plain Rivers in 1943 was used for verification;and the calculated water level is in agreement with the observed ones.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2010年第1期1-4,共4页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:50539060)
关键词
串流
数值模拟
SIMPLE算法
fork-conflux flow numerical simulation SIMPLE algorithm
