Low-drag events in transitional wall-bounded turbulence



Whalley, RD, Park, JS, Kushwaha, A, Dennis, DJC ORCID: 0000-0003-0214-7885, Poole, RJ ORCID: 0000-0001-6686-4301 and Graham, MD
(2017) Low-drag events in transitional wall-bounded turbulence. Physical Review Fluids, 2.

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Abstract

Intermittency of low-drag pointwise wall shear stress measurements within Newtonian turbulent channel flow at transitional Reynolds numbers (friction Reynolds numbers 70 – 130) is characterized using experiments and simulations. Conditional mean velocity profiles during low-drag events closely approach that of a recently discovered nonlinear traveling wave solution; both profiles are near the so-called maximum drag reduction profile, a general feature of turbulent flow of liquids containing polymer additives (despite the fact that all results presented are for Newtonian fluids only). Similarities between temporal intermittency in small domains and spatiotemporal intermittency in large domains is thereby found.

Item Type: Article
Uncontrolled Keywords: Fluid flows, Turbulence
Depositing User: Symplectic Admin
Date Deposited: 08 Mar 2017 12:23
Last Modified: 21 Apr 2021 19:22
DOI: 10.1103/PhysRevFluids.2.034602
Open Access URL: http://link.aps.org/doi/10.1103/PhysRevFluids.2.03...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006254