The decay of two counter‐rotating point vortices of equal strength in a viscous incompressible fluid is studied by solving the Navier–Stokes equations with a finite‐difference technique. Solutions for Reynolds numbers 10, 50, and 100 are compared with a model presented by Cantwell and Rott. Equivorticity lines and the decay rate of translational velocity and circulation of the half‐plane are presented, together with the diverging paths of the vortex pair.

中文翻译：

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粘性流体中一对点涡的衰减

两个反向旋转点的衰减 旋涡 在一个相等的力量 粘性的 通过解决Navier–Stokes研究不可压缩流体 方程式 用有限差分技术 解决方案 对于 雷诺数 将10、50和100与 模型由Cantwell和Rott提出。给出了等价线和平移速度的衰减率以及半平面的循环，并给出了涡流 对。