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.
Image: Fig.2 from Linkmann et al. "Sudden relaminarisation and lifetimes in forced isotropic turbulence" cited in Linkmann, Moritz; Morozov, Alexander. (2015). Sudden relaminarisation and lifetimes in forced isotropic turbulence, [dataset]. University of Edinburgh, School of Physics and Astronomy. https://doi.org/10.7488/ds/295.
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By tracking the divergence of two initially close trajectories in phase space of forced turbulence, the relation between the maximal Lyapunov exponent λ, and the Reynolds number Re is measured using direct numerical ...
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 ...