
收稿日期
作者简介王党伟男博士研究生从事水力学及河流动力学方面的研究Emailwangkucom
通讯作者余明辉女教授从事水力学及河流动力学方面的研究Emailmhyunet
基金项目国家计划项目编号CB国家自然科学基金项目编号
文章编号
间 断 洪 水 波 高 精 度 数 值 模 拟 与 应 用
王党伟
余明辉
刘晓芳
余飞
武汉大学水资源与水电工程科学国家重点实验室湖北 武汉
中国水利水电科学研究院泥沙研究所北京
中国科学院地理科学与资源研究所北京 中南电力设计院湖北 武汉
摘要
基于守恒型浅水二维方程采用三单元模板的加权本质无震荡WENO格式插值界面两侧守恒变量并采用
Roe 方法计算界面处数值通量建立了平面二维溃坝水流数学模型为使模型总体精度不致因为时间离散而降低
源项采用三阶 RungeKutta 方法进行处理时间步进采用自适应步长法验证结果表明数学模型计算结果与精确解
基本一致间断处数值解无明显震荡具有高分辨率和高精度数学模型应用于坝体溃决后水流在干河床上运动
河道部分堤防溃决后水流同时在河道以及洪泛区的演进过程以及天然复杂地形条件下实际工程溃堤方案的比选
等预测计算
关键词溃坝水流激波浅水方程数值模拟
中图分类号
TV
文献标志码
A
Numerical simulation with high precision for flood shock wave
WANG Dangwei
YU Minghui
LIU Xiaofang
YU Fei
State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan China
China Institute of Water Resources and Hydropower Research Beijing China
Institute of Geographical Sciences and Natural Resources Research Beijing China
Central Southern China Electric Power Design Institute Wuhan China
Abstract A D numerical model for flow with shock is established based on the differential conservation law form
of nonlinear shallow water equations which uses WENO sheme containning three cells to calculate the conserved
variables at the interface and Roe method to calculate the flux at the interfaceIn order to keep the precision of the
model three steps RungeKutta method is used for solving source terms and the adaptive method for time step is
applied for time evolvementThe model is verified by compared the numerical result with the analytical results and
it is shown that the two results are indenticalThe result of the numerical model shows high accurancy and with es
sentially nonoscillatory so it can be used in calculating the flow evolution due to dambreakFinally the model
is applied to two practical situations one is predicting the dambreak flow evolvement in dry river bed the other is
to simulate the flow in the river and in the flood storage and detention basins at the same time when dike burst hap
pens in which the flow field and water level around the burst are presented
Key words dambreak wave shock shallow water equations numerical simulation
针对溃堤溃坝水流运动的数值模拟需求解非
恒定流拟线性双曲型偏微分方程的有间断问题求
解复杂难度较大
其理论解只限于简单棱柱体
渠道平底无阻力情况溃坝物理模型也只能做到
水位跟踪不能测定非恒定流流量因此精确的数
值模拟是目前溃坝分析中不可替代的手段
计算