# The Azimuth Project Vorticity (changes)

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# Contents

## Idea

Vorticity $\vec{\omega} = \nabla \times \vec{u}$ is the rotation of a field of fluid velocity $\vec(u)$. It is an important concept in the description of solutions of the Navier-Stokes equations, especially for turbulence. It is used to define enstrophy.