水利水电科技进展2013，Vol.33Issue(1)：22-26,5.DOI:10.3880/j.issn.1006-7647.2013.01.005
山区宽窄相间河道平面二维水流数值模拟
Two-dimensional numerical simulation of flows in wide and narrow alternated channels in mountainous areas
摘要
Abstract
The plane configuration of river channels in mountainous areas often exhibits gradual characteristics of wide and narrow alternated variations under the effect of geological conditions and riverbed evolution. A two-dimensional mathematical model for wide and narrow alternated river channels in mountainous areas was established by dividing computational domains using the body-fitted coordinates, discretizing governing equations using the finite volume method and solving equation by the SIMPLER algorithm. The model simulations were compared with the observations of flume experiment and the calculated ones by use of the hydrodynamic surface water modeling system ( SMS). The results show that the proposed model can satisfactorily depict the two-dimensional flow motion characteristics of wide and narrow alternated river channels. The gradual wide variations of river channels will lead to change of their water depth and velocity. The flow velocity at the narrowest section reaches is the largest and the depth is the smallest. The flow velocity at the widest section is the smallest and the depth is the largest.关键词
宽窄相间河道/平面二维数值模拟/贴体坐标/有限体积法/SIMPLER算法Key words
wide and narrow alternated channel/ two-dimensional numerical simulation/ body-fitted coordinates/ finite volume method/ SIMPLER algorithm分类
建筑与水利引用本文复制引用
周苏芬,易子靖,闫旭峰,杨青远,王协康..山区宽窄相间河道平面二维水流数值模拟[J].水利水电科技进展,2013,33(1):22-26,5.基金项目
国家自然科学基金(41171016) （41171016）
四川大学水力学与山区河流开发保护国家重点实验室开放基金(1008) （1008）
