Viewed as sinews and muscles of fluid motion, coherent vortical structures with their interactions are key to understanding the flow dynamics. Based upon this observation, we explore the possibility of efficient flow control by directly manipulating vortices numerically inside the flow field based on the vortex definition and identification system of Liutex. The objective is twofold: (1) to study the vortex dynamics, for example, by observing the response of the flow to strengthening or weakening of certain vortices, and (2) to obtain efficient vortex-based control strategies which might lead us to practical applications. In the present numerical study, the manipulating of vortices is achieved by introducing additional source (force) terms to the Navier-Stokes equations, which hereafter will be collectively called Liutex force field model. Methodologies including controlling the rotation strength and centripetal force of particular vortices are detailed in a flow past a cylinder with different control purposes at Reynolds number of 200. Further examples are provided with a cavitating flow around two-dimensional Clark-Y hydrofoil, with particular interests on cavitation suppression. It is illustrated particular vortex with cavitation encircled could be effectively suppressed.

被视为流体运动的筋骨和肌肉，相干的涡旋结构及其相互作用是理解流动动力学的关键。基于此观察，我们基于Liutex的涡流定义和识别系统，通过直接在流场内数字地控制涡流，探索了有效流量控制的可能性。目的是双重的：（1）研究涡旋动力学，例如，通过观察流动对某些涡旋的增强或减弱的响应，以及（2）获得有效的基于涡旋的控制策略，这可能使我们实用应用程序。在当前的数值研究中，通过将额外的源（力）项引入Navier-Stokes方程实现旋涡的操纵，以下将这些方程统称为Liutex力场模型。包括控制特定涡旋的旋转强度和向心力的方法在流经圆柱的流中有详细说明，其控制目的不同，其雷诺数为200。围绕二维Clark-Y水翼的空化流提供了更多示例，尤其受关注抑制气蚀。示出了可以有效地抑制围绕有气蚀的特定涡旋。