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Universal Return to Isotropy of Inhomogeneous Atmospheric Boundary Layer Turbulence. | LitMetric

Universal Return to Isotropy of Inhomogeneous Atmospheric Boundary Layer Turbulence.

Phys Rev Lett

Department of Mechanical Engineering, University of Utah, Salt Lake City, Utah 84112, USA.

Published: May 2021

AI Article Synopsis

Article Abstract

A recalcitrant problem in the physics of turbulence is the representation of the tendency of large-scale anisotropic eddies to redistribute their energy content with decreasing scales, a phenomenon referred to as return to isotropy. An unprecedented dataset of atmospheric turbulence measurements covering flat to mountainous terrain, stratification spanning convective to very stable conditions, surface roughness ranging over several orders of magnitude, and Reynolds numbers that far exceed the limits of direct numerical simulations and laboratory experiments was assembled for the first time and used to explore the scalewise return to isotropy. The multiple routes to energy equipartitioning among velocity components are shown to be universal once the initial anisotropy at large scales, linked to turbulence generation, is accounted for.

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Source
http://dx.doi.org/10.1103/PhysRevLett.126.194501DOI Listing

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