What is the enstrophy equation and how is it used in fluid dynamics?

The enstrophy equation in fluid dynamics is a mathematical expression that describes the rate of change of enstrophy, a measure of the amount of vorticity in a fluid flow. Enstrophy is important in understanding the behavior of turbulent flows and can help predict the development of turbulence in a fluid. The equation is used to analyze and study the dynamics of vortices and turbulence in fluid systems.