The motion of fluid consists of different scales of coherent vortical structures. These vortical structures determine the characteristics of fluid motion and are key to understand fluid dynamics. In this paper, we study the fine control method of vortical structures based on the Liutex force field model. This is achieved by constructing a source term using Liutex and directly add it to the Navier-Stokes equations. To investigate the influence of the constructed Liutex force model on vortical structures, a flow past a cylinder at Reynolds number of 100 is numerically studied with different source term magnitude and region. The drag and lift forces on the cylinder, as well as the flow field near and behind the cylinder are compared and analyzed. Results show that Liutex force model can effectively strengthen or weaken the vortical structures based on different purpose.

流体的运动由不同尺度的相干涡结构组成。这些涡旋结构决定了流体运动的特征，是理解流体动力学的关键。在本文中，我们研究了基于Liutex力场模型的旋涡结构的精细控制方法。这是通过使用Liutex构造源项并将其直接添加到Navier-Stokes方程中来实现的。为了研究构造的Liutex力模型对旋涡结构的影响，以不同的源项幅值和区域对通过雷诺数为100的圆柱体的流动进行了数值研究。比较并分析了圆柱体上的阻力和升力以及圆柱体附近和后面的流场。