Fluid Dynamics far from Local Equilibrium

Understand

Fluid dynamics is traditionally thought to apply only to systems near local equilibrium.

• In this case, the effective theory of fluid dynamics can be constructed as a gradient series.
• Recent applications of resurgence suggest that this gradient series diverges, but can be Borel-resummed, giving rise to a hydrodynamic attractor solution which is well defined even for large gradients.
• Arbitrary initial data quickly approaches this attractor via non-hydrodynamic mode decay.