Isotropic turbulence is an idealised turbulent state in which the turbulent fluctuations are statistically uniform in all directions. It can be thought of as turbulent flow far away from boundaries and thus serves as a useful simplification in order to facilitate the study of fundamental properties of turbulent flows.
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We demonstrate an unexpected connection between isotropic turbulence and wall-bounded shear flows. We perform direct numerical simulations of isotropic turbulence forced at large scales at moderate Reynolds numbers and ...
Self-organization and transition to turbulence in isotropic fluid motion driven by negative damping at low wavenumbers We observe a symmetry-breaking transition from a turbulent to a self-organized state in direct numerical simulation of the Navier-Stokes equation at very low Reynolds number. In this self-organised state the kinetic energy ...