Dissipation in unsteady turbulence

Wouter J.T. Bos , Robert Rubinstein

Recent experiments and simulations have shown that unsteady turbulent flows, before reaching a dynamic equilibrium state, display a universal behaviour. We show that the observed universal non-equilibrium scaling can be explained using a non-equilibrium correction of Kolmogorov's energy spectrum. Given the universality of the experimental and numerical observations, the ideas presented here lay the foundation for the modeling of a wide class of unsteady turbulent flows.

Domaines: Mécanique des fluides [physics.class-ph]

Wouter J.T. Bos, Robert Rubinstein. Dissipation in unsteady turbulence. 2016. ⟨hal-01380627v1⟩