数值模拟电磁力作用下的椭圆柱绕流

利用格子Boltzmann方法(LBM),对电磁力作用下的椭圆柱绕流进行数值模拟,研究了电磁力椭圆柱绕流的影响,并且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椭圆柱绕流的流线,揭示了它的变化机理。结果表明:格子 Boltzmann method方法计算过程简单合理,而且电磁力能够改变椭圆柱绕流的边界层结构,抑制椭圆柱表面的流动分离,消除旋涡脱落。

Numerical Investigation of the Flow Around an Elliptic Cylinder by Electromagnetic Force

The flow around an elliptic cylinder controlled by electromagnetic force is simulated numerically by the lattice Boltzmann method. The effect of electromagnetic force on the flow has been investigated. And the treatment of curved boundary and the evaluation of the boundary forces are analyzed. The streamlines are presented for the flow past an elliptic cylinder with various electromagnetic forces and the mechanism of changes is explained. Numerical results verify that the lattice Boltzmann method is simple and suitable to handle the case. Moreover, it confirms that the electromagnetic force can modify the boundary layer around an elliptic cylinder, prevent the boundary layer from separation, and suppress the shedding of vortices.