用Lattice Boltzmann方法计算矩形柱的绕流问题  

Lattice Boltzmann Simulation of Flow Past a Rectangular Cylinder

作　　者：谭玲燕[1] 陈明杰[2] 施卫平[1] 黄艳金[1] 

机构地区：[1]吉林大学数学学院,长春130012 [2]沈阳飞机设计研究所,沈阳110035

出　　处：《吉林大学学报（理学版）》2009年第2期273-276,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:J0630104)

摘　　要：采用二维9速度Lattice Boltzmann模型,数值模拟流体流过矩形截面柱体的绕流问题.在边界处,采用二阶精度的插值边界处理方法,计算了流动的Strouhal数及柱体受到的升力和阻力系数,给出了流场的流线和等涡线图.使来流方向与矩形柱的长边方向平行,计算结果表明,改变矩形的长/宽比,流场的Strouhal数随长/宽比呈线性变化.A two-dimensional nine-velocity Lattice Boltzmann model was employed to simulate the tlow past a rectangular elongated cylinder numerically. The second-order interpolation scheme was used for the boundary treatment. The Strouhal number, the drag coefficient and lift coefficient were calculated. The streamlines and the vorticity contours were presented. Under varying the length/width ratio of the rectangular, and keeping the inlet velocity to be parallel to the length side of the rectangular cylinder, numerical results show that the Strouhal number varies linearly with the length/width ratio.

关 键 词：LATTICE BOLTZMANN方法 Strouhal数 矩形柱 流线 等涡线 

分 类 号：O354[理学—流体力学]