Journal
PHYSICAL REVIEW FLUIDS
Volume 2, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevFluids.2.034602
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/J018163/1]
- National Science Foundation [CBET-1066223]
- Air Force Office of Scientific Research [FA9550-11-1-0094, FA9550-15-1-0062]
- EPSRC [EP/J018163/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J018163/1] Funding Source: researchfish
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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 flowof 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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