大系数法与壁函数结合在丁坝绕流三维数值模拟中的应用  

3-D numerical simulation of flow field around spur dike using wall function and large coefficient method

作　　者：假冬冬[1] 邵学军[1] 周刚[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水利水运工程学报》2008年第1期36-41,共6页Hydro-Science and Engineering

基　　金：国家自然科学基金资助项目(50479004;50221903);国家科技支撑计划项目(2006BAB05B03)

摘　　要：采用三维紊流模型对实验室丁坝绕流进行了数值模拟,利用标准k-ε模型将大系数法与壁函数相结合处理丁坝边界.模拟结果表明,模型能有效地处理丁坝边界,较好地模拟了坝头分离流、丁坝后回流及回流区横断面上的二次流,计算值与实测值吻合较好.Numerical modeling is an important tool applied to study local flow field with a spur dike. The flow field around the spur dike is simulated with a 3-D numerical model in this study. The standard k-ε model is used. The wall function and large coefficient method are applied to treat the boundary of the spur dike. The flow field around the spur dike in laboratory is simulated. The simulated results demonstrate that the boundary of the spur dike can be treated efficiently, and the model can successfully simulate the separate structure of flow at the top of the spur dike, the circumfluence behind the spur dike and the secondary flow in the cross section in the circumfluence area. The computed results agree well with the experimental data.

关 键 词：丁坝绕流 三维数值模型 丁坝边界 大系数法 壁函数 

分 类 号：TV133[水利工程—水力学及河流动力学] TV863