分汊河道三维紊流数值模拟研究  

Study on 3-D Turbulent Flow Numerical Simulation in Braided River

作　　者：武亚辉[1] 马建礼[1] 范迎春[1] 

机构地区：[1]河北省水利水电勘测设计研究院,天津300250

出　　处：《水科学与工程技术》2012年第4期43-46,共4页Water Sciences and Engineering Technology

摘　　要：分汊河道水流计算方法研究,是准确模拟分汊河道水流运动,研究分汊河道泥沙运动、河道演变规律和水质变化规律的基础。选用三维RNG k-ε紊流模型,对长江镇扬河段世业洲汊道水流进行整体与局部的数值模拟,并采用刚盖假定法与VOF法分别对其自由表面进行处理,比较分析两种方法在分汊河道水流模拟中的差异。The research on calculation method of braided stream is the base on simulating water flow accurately as well as studying sediment movement,evolution and water quality.In this article,three-dimensional RNG k-ε turbulence model is used for numerical simulation of water flow.The numerical simulation is performed at the braided water flow of Shiyezhou in Zhenyang reach of Yangtze River globally and locally.Meanwhile,rigid-lid assumption and VOF method are respectively used in processing water surface,through which the difference of these two methods in simulation of water flow in braided streams are compared and analyzed.

关 键 词：分汊河道水流 数值模拟 VOF法 刚盖假定 整体与局部模拟 

分 类 号：TV149[水利工程—水力学及河流动力学]