Low-drag events in transitional wall-bounded turbulence

Richard D. Whalley; Jae Sung Park; Anubhav Kushwaha; David J.C. Dennis; Michael D. Graham; Robert J. Poole

doi:10.1103/PhysRevFluids.2.034602

Low-drag events in transitional wall-bounded turbulence

Richard D. Whalley, Jae Sung Park, Anubhav Kushwaha, David J.C. Dennis, Michael D. Graham, Robert J. Poole

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

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.

Original language	English (US)
Article number	034602
Journal	Physical Review Fluids
Volume	2
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevFluids.2.034602
State	Published - Mar 2017

ASJC Scopus subject areas

Computational Mechanics
Modeling and Simulation
Fluid Flow and Transfer Processes

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title = "Low-drag events in transitional wall-bounded turbulence",

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.",

author = "Whalley, {Richard D.} and Park, {Jae Sung} and Anubhav Kushwaha and Dennis, {David J.C.} and Graham, {Michael D.} and Poole, {Robert J.}",

note = "Funding Information: This work has been supported by the Engineering and Physical Sciences Research Council (EPSRC) under Grant No. EP/J018163/1, the National Science Foundation through Grant No. CBET-1066223, and the Air Force Office of Scientific Research through Grants No. FA9550-11-1-0094 and No. FA9550-15-1-0062 (Flow Interactions and Control Program). The direct numerical simulation code used here was developed and distributed by John Gibson at the University of New Hampshire. We thank the EPSRC for the loan of the SPIV system used to carry out this research.",

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AU - Park, Jae Sung

AU - Kushwaha, Anubhav

AU - Dennis, David J.C.

AU - Graham, Michael D.

AU - Poole, Robert J.

N1 - Funding Information: This work has been supported by the Engineering and Physical Sciences Research Council (EPSRC) under Grant No. EP/J018163/1, the National Science Foundation through Grant No. CBET-1066223, and the Air Force Office of Scientific Research through Grants No. FA9550-11-1-0094 and No. FA9550-15-1-0062 (Flow Interactions and Control Program). The direct numerical simulation code used here was developed and distributed by John Gibson at the University of New Hampshire. We thank the EPSRC for the loan of the SPIV system used to carry out this research.

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N2 - 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.

AB - 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.

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