针对流体力学中模拟圆柱绕流的边界层内部流动问题,采用格子Boltzmann方法,用两个分布函数分别定义涡量和流函数,得到用两个格子Boltzmann方程建立的模型。以数值为例,圆柱绕流的数值模拟结果符合经典的理论结果。与直接模拟Navier-Stokes方程相比,该方法计算模型简单,分布函数简单,易于计算。
For modeling the boundary layer flow around a circular cylinder in hydromechanics,a lattice Boltzmann method is proposed.Two distribution functions are used to define the vortices and stream function.Then the model is obtained using two lattice Boltzmann equations.The numerical modeling results are in accordance with the classical theoretical results.Compared with the modeling using Navier-Stokes equations directly,these models and the distribution functions are relatively simple,and easy to use.