用格子Boltzmann方法计算电磁场中圆柱绕流的减阻问题  

Lattice Boltzmann Simulation of Drag Reduction for the Flow around Circular Cylinder in Electromagnetic Field

作　　者：施卫平[1] 李秀文[1] 贺鹏[1,2] 

机构地区：[1]吉林大学数学学院,长春130012 [2]空军航空大学训练部教务处,长春130022

出　　处：《吉林大学学报（理学版）》2011年第4期575-579,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:10972089)

摘　　要：利用格子Boltzmann方法,模拟电磁场中的圆柱绕流过程,研究电磁力对圆柱所受阻力的影响,并分析了曲线边界处理方法和曲线边界受力的计算方法;计算得到了不同强度的电磁力作用下圆柱绕流的流线、等涡线及阻力系数.结果表明,电磁力能改变圆柱绕流的边界层结构,延缓边界层的分离,同时还能有效抑制旋涡的脱落,减少阻力.The flow past a circular cylinder in the electromagnetic field was simulated by the lattice Boltzmann method.The effect of electromagnetic force on the cylinder was investigated.The treatment of curved boundary and the evaluation of the boundary forces were analyzed.The streamlines,vorticity contours,drag coefficient were presented for the flow past a circular cylinder under various electromagnetic force.Numerical results show that electromagnetic force can modify the configuration of the boundary layer around a circular cylinder and is able to prevent the boundary layer from separation.At the same time,the electromagnetic force is capable of suppressing the shedding of vortices,and reducing the drag.

关 键 词：减阻 电磁流体力学 格子BOLTZMANN方法 电磁力 

分 类 号：O361.5[理学—流体力学]