For complex aerodynamic and hydrodynamic problems, the analysis of vortex is very important. The Liutex method is an eigenvalue-based method which is local, accurate, and unique, which can give an accurate definition of vortex, so the control of vortex can be implemented and effectively guaranteed. Based on Liutex method, two methodologies of centripetal force model and counter-rotation force model were proposed to illustrate the vortex dynamics and possibly strengthen or weaken the vortices. In this paper, the Liutex-based centripetal force model is applied by adding a source term to the Navier-Stokes equations. In order to investigate the influence of the constructed Liutex force model on the 3-dimensional flow around a slow-fat ship, the calm-water drag calculation result of JBC ship is regarded as the initial flow field, and the new resistance and wake performances of the ship are obtained after applying the centripetal force model to the flow field with different strengths. Several views of the comparisons of the new steady flow fields are shown, and the parametric study results indicate that the Liutex-based centripetal force model can effectively change the resistance and wake performances of the JBC ship, which provides a new idea and theoretical basis for the comprehensive hydrodynamic performance optimization of the ship hull.

对于复杂的空气动力学和流体动力学问题，涡的分析非常重要。Liutex方法是一种基于特征值的方法，它具有局部性、精确性和独特性，可以准确地定义涡流，从而实现涡流控制并得到有效保证。在Litex方法的基础上，提出了向心力模型和反旋转力模型两种方法来说明涡流动力学并可能增强或减弱涡流。在本文中，通过向 Navier-Stokes 方程添加源项来应用基于 Liutex 的向心力模型。为研究所构建的Liutex力模型对慢速船周围三维流动的影响，将JBC船的静水阻力计算结果作为初始流场，将向心力模型应用于不同强度的流场后，得到了船舶新的阻力和尾流性能。给出了新稳态流场对比的几种观点，参数研究结果表明，基于Liutex的向心力模型可以有效地改变JBC船的阻力和尾流性能，为研究提供了新的思路和理论基础。船体水动力综合性能优化[J].