计算力学学报2012，Vol.29Issue(4)：599-603,5.
河型发育过程的二维数值模拟研究
2D Numerical simulation for the formation of channel pattern
摘要
Abstract
A sediment transport and bed morphology model considering the secondary flow and non-uni- form of sediment with armored beds was established based on the 2D depth-averaged hydrodynamic model previously developed in this paper. A simple simulation method considering the influence of river bend was adopted in the non-cohesive bank erosion, so that it is capable to simulate the evolution of sand bars. A 180°bend with a constant radius under unsteady flow conditions and the laboratory experiments of Friedkin on the initiation and evolution processes of non-cohesive meandering channels was simulated with the model, the results agree well with field measurements, it demonstrates the extended model can reflect the formation mechanism of river bend. The extended model can be applied to simulate fluvial processes to study the transformation mechanism of alluvial rivers.关键词
河床演变/二次流/河床粗化/非粘性土崩岸/二维数值模拟Key words
fluvial processes/secondary flow/armored beds/non-cohesive bank erosion/2D numericalmodel分类
建筑与水利引用本文复制引用
肖毅,邵学军,周建银,周刚..河型发育过程的二维数值模拟研究[J].计算力学学报,2012,29(4):599-603,5.基金项目
国家自然科学基金（51039004,50979043）资助项目. （）
