On Geometrical Alignment Properties of Two-Dimensional Forced Turbulence

In the present work we investigate the physical mechanisms which underlie the formation and evolution of the enstrophy cascade in two-dimensional (2D) forced turbulence. Following the work [1], it is argued that analysis of vorticity gradient can capture important aspects of the enstrophy dynamics. An extensive discussion of the generation of strong vorticity jumps in 2D turbulence can be found in [2] (and references quoted therein). Intensity …