水科学进展2012，Vol.23Issue(2)：236-242,7.
明渠交汇水流阻力对平面二维数值模拟的影响
Influence of additional resistances on numerical simulation of 2 D flow at river channel confluences
摘要
Abstract
Due to separated flow and free shear flow, the turbulent properties at river channel confluences are much different from that in common channels. By comparing experimental data with numerical simulations, the significance of additional resistances resulting from separated flow and free shear flow is illustrated in this study. Because of the two-dimensional (2D) assumption, the vertical velocity variation is not considered in 2D models, which can result in large errors for high flow rate ratios. In contrast, the assumption is generally valid for low flow rate ratios. Thus, the proper treatment of additional resistances in numerical simulation of confluence flow is vital to the success of solving engineering problems.关键词
交汇水流/平面二维模型/入汇流量比/紊动粘性阻力/环流阻力Key words
confluence flow/ depth-averaged 2D model/ flow rate ratio/ turbulent resistance/ circulation resistance分类
建筑与水利引用本文复制引用
杨青远,周苏芬,卢伟真,王协康..明渠交汇水流阻力对平面二维数值模拟的影响[J].水科学进展,2012,23(2):236-242,7.基金项目
水力学与山区河流开发保护国家重点实验室开放基金资助项目(1008) （1008）
国家自然科学基金资助项目(41171016) （41171016）
