基于多松弛格子玻尔兹曼的弯道水流三维数值模拟  

Three-dimensional numerical simulation of bend flow based on the multi-relaxation times lattice Boltzmann method

作　　者：丁全林[1,2] 王玲玲[3] 汪德爟[2] 方政[1] 

机构地区：[1]河海大学力学与材料学院,江苏南京210098 [2]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [3]河海大学水利水电学院,江苏南京210098

出　　处：《水科学进展》2012年第4期523-528,共6页Advances in Water Science

基　　金：中央高校基本科研业务费专项资金资助项目(2010B07714);国家自然科学基金资助项目(51179058)~~

摘　　要：为研究弯道水流现象并且拓展格子玻尔兹曼(Lattice Boltzmann Method,LBM)在水利工程领域的应用,建立了弯道水流的三维多松弛LBM演进模型,其中包括水流自由表面模拟、弯曲固壁边界处理以及紊流模型耦合求解等关键技术。应用该模型模拟研究了不同流量下U型弯道的水流状态,得到了水位、最大水深平均流速以及紊动能等参数的分布规律。分析和实践表明,该模型能较好地模拟三维弯道水流现象。For researching bend flows, as well as expanding the application of the Lattice Bohzmann Method （LBM） in the water conservancy field, a 3D multi-relaxation times LBM model, which includes free surface simulation, curved boundary treatment and turbulence models solving, was established. U-type bend flows under different flow rates were simulated, and the distributions of water level, maximum depth-averaged velocities and turbulent kinetic energy were obtained. Both the theoretical analysis and the simulation result indicate that the model in the paper can adequately simulate 3D bend flows.

关 键 词：多松弛格子玻尔兹曼 流体 弯道水流 紊流模型 

分 类 号：TV133.2[水利工程—水力学及河流动力学]