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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