Strain field from Galerkin-truncated Euler equation.

Showing the time evolution of pseudo-color plots of the strain tensor component (S_yz) in the XY plane from DNS (N=512) of three-dimensional incompressible, Galerkin-Truncated Euler equation.
Illustrating how an ideal fluid starting with large-scale initial condition transitions to a fully thermalized state. The onset of thermalization is noted in the vibrant appearance of coherent streak of oscillations originating from intense structures.