Structure of coherent vortices generated by the inverse cascade of two-dimensional turbulence in a finite box

摘要

We discuss structure and geometrical characteristics of coherent vorticesappearing as a result of the inverse cascade in the two-dimensional turbulencein a finite box. We demonstrate that the universal velocity profile,established previously, corresponds to the passive regime of flow fluctuations.We find the vortex core radius and the vortex size and argue that an amount ofthe vortices generated in the box depends on the system parameters.