用Lattice Boltzmann方法计算矩形柱的绕流问题

用Lattice Boltzmann方法计算矩形柱的绕流问题

谭玲燕¹, 陈明杰², 施卫平¹, 黄艳金¹

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

收稿日期:2008-07-17 修回日期:1900-01-01 出版日期:2009-03-26 发布日期:2009-03-26
通讯作者: 施卫平

Lattice Boltzmann Simulation of Flow Past a Rectangular Cylinder

TAN Lingyan¹, CHEN Mingjie², SHI Weiping¹, HUANG Yan jin¹

1. College of Mathematics, Jilin University, Changchun 130012, China;2. Shenyang Aircraft Design & Research Institute, Shengyang 110035, China

Received:2008-07-17 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
Contact: SHI Weiping

摘要/Abstract

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.

关键词: LatticeBoltzmann方法, Strouhal数, 矩形柱, 流线, 等涡线

Abstract: A twodimensional ninevelocity Lattice Boltzmann model was employed to simulate the flow 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.

Key words: Lattice Boltzmann method, Strouhal number, rectangular elongated cylinder, streamline, vorticity contour

中图分类号:

O354

谭玲燕, 陈明杰, 施卫平, 黄艳金. 用Lattice Boltzmann方法计算矩形柱的绕流问题[J]. J4, 2009, 47(02): 273-276.

TAN Lingyan, CHEN Mingjie, SHI Weiping, HUANG Yan jin. Lattice Boltzmann Simulation of Flow Past a Rectangular Cylinder[J]. J4, 2009, 47(02): 273-276.