高雷诺数下圆柱绕流数值模拟与分析  

Numerical Simulation and Analysis of Flow Around an Cylinder at High Reynolds Number

作　　者：武频[1] 高升[1] 

机构地区：[1]上海大学计算机工程与科学学院,上海200444

出　　处：《微电子学与计算机》2014年第11期139-142,147,共5页Microelectronics & Computer

基　　金：国家自然科学基金项目(11002086);国家科技支撑计划(2009BAG12A01;2009BAG11B02)

摘　　要：将大涡模拟(Large Eddy Simulation,LES)和多弛豫时间格子玻尔兹曼(Multiple Relaxation Time(MRT)LBM)方法相结合,用于解决LBM方法在高雷诺数流动模拟产生的数值不稳定的问题.结合D2Q9-MRT模型与Smargorinsky涡粘模型,对高雷诺数下二维圆柱绕流进行数值模拟.并根据实验结果,系统分析了圆柱绕流涡的脱落形态,以及Strouhal数和其阻力升力系数随雷诺数的变化情况.实验结果表明该方法可以很好增加LBM在高雷诺数模拟中数值稳定性.In this paper ,large-eddy simulation combined with multi-relaxation time lattice Boltzmann (MRT-LBM ) method is proposed for solving the poor stability problem in high Reynolds number flow simulation with LBM .The implementation is discussed in the context of 9-velocity (D2Q9 ) MRT-LBM model in conjunction with the Smargorinsky subgrid closure model .This model is used for doing the two-dimensional numerical simulation of flow around a cylinder with a high Reynolds number .According to the experimental results ,a systematic analysis of the form of shed vortex of flow around cylinder is made , and the variation of the Strouhal number and the drag coefficient with the change of Reynolds number .The experimental results show that the method can well increase numerical stability in the simulation with LBM in a high Reynolds number .

关 键 词：格子BOLTZMANN方法 多弛豫时间 大涡模拟 高雷诺数 

分 类 号：O357.5[理学—流体力学]