摘要
尾水外排入长江口水域的数值模拟中,为提高对该水域中水动力场、浓度场模拟的精度,采用坐标变换方法建立了泊松方程控制的贴体正交曲线网格系统。选择适当的聚并函数控制的方程生成网格的结果,与拉普拉斯方程变换后的贴体正交曲线网格系统进行了比较分析,表明相同条件下前者效果更好,且能很好地拟合研究区域的复杂边界及计算水域,该方法适用于含有小岛的长江口水域复杂的多连通域的网格生成。
A new modified method of orthogonal body-fitted meshes within curvilinear Coordinate System was presented. By comparing the function of two ways for transformation coordinate, i.e., Laplace equations and Poisson equations, the result showed that, to physical domain with complicated boundary, the selected control functions about P & Q of this paper were suitable for generating orthogonal body-fitted mesh system. Moreover, a further improvement has put out to get better effect on the boundary orthogonal procedure. The method has also been applied to the sophisticated Yangtze estuary and good simulation being approached.
出处
《上海环境科学》
CAS
CSSCI
CSCD
北大核心
2001年第5期221-223,240,共4页
Shanghai Environmental Sciences
基金
上海市建设技术发展基金资助项目
编号:A9906111
关键词
长江口水域
水动力场
浓度场
数值模拟
贴体坐标
网格生成
尾水外排
Yangtze estuary Hydrodynamic fieldConcentration field Numerical simulation Body-fitted coordinate Mesh generation
