摘要
计算速度是影响二维非恒定流数学模型应用推广的主要原因之一。本文采用了多重网格方法以提高其计算速度 ,同时为了适应复杂不规则的边界条件和水下地形 ,利用坐标变换来克服天然河道复杂边界条件给模拟带来的困难 ,通过算例分析了多重网格法的收敛特性 。
The convergent speed is one of the important reasons to affect the application of 2 D numerical models for unsteady flow and sediment transport. In this paper, a so\|called multigrid method is used to improve the computational speed. Meanwhile, the coordinate transformation method is used to fit the complicated and irregular boundary conditions. The analysis to the iteration characteristic of the multigrid method by a case study shows that the method can greatly improve the numerical convergent speed. Finally, the proposed 2 D model was verified by using the field data in Wuhan reach of Yangtze River.
出处
《泥沙研究》
CSCD
北大核心
2001年第6期27-32,共6页
Journal of Sediment Research
基金
本文得到国家自然科学基金和水利部重大研究项目 ( 5 9890 2 0 0 )的资助
