用格子Boltzmann方法计算剪切流的方柱绕流问题  

Numerical Simulation of Linear Shear Flow Past a Square Cylinder with Lattice Boltzmann Method

作　　者：陈明杰[1] 施卫平[1] 

机构地区：[1]吉林大学数学学院,长春130012

出　　处：《吉林大学学报（理学版）》2007年第1期11-14,共4页Journal of Jilin University:Science Edition

基　　金：科技部国际科技合作重点项目基金(批准号:2005DFA00850)

摘　　要：用格子Boltzmann方法计算来流为水平剪切流的方柱绕流问题,得到了在不同速度梯度条件下方柱绕流的流线和等涡线图.发现在圆柱尾部形成两排涡,当来流速度梯度较大时,两排涡有很大的不同.计算结果表明,用格子Boltzmann方法计算剪切流的方柱绕流问题是可行的,计算结果与理论分析相符.A numerical simulation on the flow past a square cylinder placed in parallel to shear flow was studied by means of lattice Bohzmann method. The flow was calculated for different velocity gradients, the streamlines and vorticity contours were obtained. Numerical results show two series of vortexes with different sizes. With the increase of the velocity gradient, the difference between the two series of vortexes appears more clearly. Numerical results are coincident with the theoretical analysis, it is identified that lattice Bohzmann method is suitable for simulating the shear flow past a square cylinder.

关 键 词：格子BOLTZMANN方法 剪切流 方柱绕流 

分 类 号：O357.1[理学—流体力学]