New insights into turbulent spots

X Wu - Annual Review of Fluid Mechanics, 2023 - annualreviews.org
Transitional–turbulent spots bridge the deterministic laminar state with the stochastic
turbulent state and affect the transition zone length in engineering flows. Turbulent spot …

An energy-efficient pathway to turbulent drag reduction

I Marusic, D Chandran, A Rouhi, MK Fu, D Wine… - Nature …, 2021 - nature.com
Simulations and experiments at low Reynolds numbers have suggested that skin-friction
drag generated by turbulent fluid flow over a surface can be decreased by oscillatory motion …

Coherent structures in wall-bounded turbulence

J Jiménez - Journal of Fluid Mechanics, 2018 - cambridge.org
This article discusses the description of wall-bounded turbulence as a deterministic high-
dimensional dynamical system of interacting coherent structures, defined as eddies with …

Reynolds stress scaling in the near-wall region of wall-bounded flows

AJ Smits, M Hultmark, M Lee, S Pirozzoli… - Journal of Fluid …, 2021 - cambridge.org
A new scaling is derived that yields a Reynolds-number-independent profile for all
components of the Reynolds stress in the near-wall region of wall-bounded flows, including …

On the effect of free-stream turbulence on boundary-layer transition

JHM Fransson, S Shahinfar - Journal of Fluid Mechanics, 2020 - cambridge.org
Free-stream turbulence (FST) and its effect on boundary-layer transition is an intricate
problem. Elongated unsteady streamwise streaks of low and high speed are created inside …

Spatio-temporal dynamics of turbulent separation bubbles

W Wu, C Meneveau, R Mittal - Journal of Fluid Mechanics, 2020 - cambridge.org
The spatio-temporal dynamics of separation bubbles induced to form in a fully developed
turbulent boundary layer (with Reynolds number based on momentum thickness of the …

Non-equilibrium three-dimensional boundary layers at moderate Reynolds numbers

A Lozano-Durán, MG Giometto, GI Park… - Journal of Fluid …, 2020 - cambridge.org
Non-equilibrium wall turbulence with mean-flow three-dimensionality is ubiquitous in
geophysical and engineering flows. Under these conditions, turbulence may experience a …

Causality of energy-containing eddies in wall turbulence

A Lozano-Durán, HJ Bae, MP Encinar - Journal of Fluid Mechanics, 2020 - cambridge.org
Turbulent flows in the presence of walls may be apprehended as a collection of momentum-
and energy-containing eddies (energy-eddies), whose sizes differ by many orders of …

On the effect of adverse pressure gradients on wall-pressure statistics in a controlled-diffusion aerofoil turbulent boundary layer

A Caiazzo, S Pargal, H Wu, M Sanjosé… - Journal of Fluid …, 2023 - cambridge.org
Wall-pressure and velocity statistics in the turbulent boundary layer (TBL) on a cambered
controlled-diffusion aerofoil at. The strong APG yields a highly non-equilibrium TBL at the …

Analysis of interscale energy transfer in a boundary layer undergoing bypass transition

H Yao, JP Mollicone, G Papadakis - Journal of Fluid Mechanics, 2022 - cambridge.org
The Kármán–Howarth–Monin–Hill equation is employed to study the production and
interscale energy transfer in a boundary layer undergoing bypass transition due to free …