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浅水流动有限体积法/Osher格式的二维水流-水质模拟
引用本文:蒋艳,杨珏,赵棣华,何海.浅水流动有限体积法/Osher格式的二维水流-水质模拟[J].生态与农村环境学报,2002,18(3):30-33.
作者姓名:蒋艳  杨珏  赵棣华  何海
作者单位:1. 河海大学,水文水资源及环境学院,江苏,南京,210098
2. 南京水利科学研究院,江苏,南京,210024
3. 河海大学,科技处,江苏,南京,210098
摘    要:应用无结构网格有限体积法 /Osher格式的二维水流 -水质耦合数值模型 ,采用黎曼近似解计算模拟区域水量、动量及污染物输送通量。通过对长江南京八卦洲江段浓度场的模拟计算 ,其结果与遥感卫星图片确定的污染带分布相吻合 ,证实了模型的合理性和模拟能力

关 键 词:有限体积法  Osher格式  无结构网格  浅水方程  对流扩散方程  水流-水质耦合数值模型
文章编号:1001-5906(2002)03-0030-04
修稿时间:2001年9月15日

Finite Volume Methods and Osher Scheme for Two-Dimensional Shallow Water Flow-Pollutant Coupled Numerical Model
Abstract:A two dimensional finite volume method and Osher scheme flow pollutant coupled numerical simulation on an unstructured grid is adopted and adapted to fit the complex planar geometry of the computational domain and the requirements of the prediction and evaluation of aquatic environmental quality.Developed in the framework of the finite volume method on an unstructured grid,the model transforms a 2 D problem into a series of local 1 D problems.By employing Osher type approximate Riemann solver,the model estimates the numerical flux of variables across the interface between cells with high accuracy.It is applied to water quality simulation of the Nanjing Reach of the Changjiang River.The simulated pollution area matches pretty well with the remote sensing satellite images,validating reasonability and applicability of the model.
Keywords:finite volume method  ?Osher scheme  ?unstructured grid  ?shallow water equation  ?convection diffusion equation  ?flow  pollutant coupled numerical model
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