Attached eddy model of wall turbulence

I Marusic, JP Monty - Annual Review of Fluid Mechanics, 2019 - annualreviews.org
Modeling wall turbulence remains a major challenge, as a sufficient physical understanding
of these flows is still lacking. In an effort to move toward a physics-based model, AA …

Decomposition of the mean skin-friction drag in compressible turbulent channel flows

W Li, Y Fan, D Modesti, C Cheng - Journal of Fluid Mechanics, 2019 - cambridge.org
The mean skin-friction drag in a wall-bounded turbulent flow can be decomposed into
different physics-informed contributions based on the mean and statistical turbulence …

Scale interactions and spectral energy transfer in turbulent channel flow

M Cho, Y Hwang, H Choi - Journal of Fluid Mechanics, 2018 - cambridge.org
Spectral energy transfer in a turbulent channel flow is investigated at Reynolds number,
based on the wall shear velocity and channel half-height, with a particular emphasis on full …

Wall shear stress fluctuations: Mixed scaling and their effects on velocity fluctuations in a turbulent boundary layer

C Diaz-Daniel, S Laizet, JC Vassilicos - Physics of Fluids, 2017 - pubs.aip.org
The present work investigates numerically the statistics of the wall shear stress fluctuations
in a turbulent boundary layer (TBL) and their relation to the velocity fluctuations outside of …

Separating large-scale superposition and modulation in turbulent channels

A Andreolli, D Gatti, R Vinuesa, R Örlü… - Journal of Fluid …, 2023 - cambridge.org
The presence of very-large-scale motions in wall-bounded turbulent flows is commonly
associated with their footprint in the form of the superposition of the large scales at the wall …

Self-sustaining processes at all scales in wall-bounded turbulent shear flows

C Cossu, Y Hwang - … Transactions of the Royal Society A …, 2017 - royalsocietypublishing.org
We collect and discuss the results of our recent studies which show evidence of the
existence of a whole family of self-sustaining motions in wall-bounded turbulent shear flows …

Identity of attached eddies in turbulent channel flows with bidimensional empirical mode decomposition

C Cheng, W Li, A Lozano-Durán, H Liu - Journal of fluid mechanics, 2019 - cambridge.org
Bidimensional empirical mode decomposition (BEMD) is used to identify attached eddies in
turbulent channel flows and quantify their relationship with the mean skin-friction drag …

Predicting the near-wall velocity of wall turbulence using a neural network for particle image velocimetry

H Wang, Z Yang, B Li, S Wang - Physics of Fluids, 2020 - pubs.aip.org
Near-wall velocity prediction for wall-bounded turbulence is useful for constructing a wall
model and estimating dissipation and wall shear stress. A convolutional neural network is …

Consistency between the attached-eddy model and the inner–outer interaction model: a study of streamwise wall-shear stress fluctuations in a turbulent channel flow

C Cheng, L Fu - Journal of Fluid Mechanics, 2022 - cambridge.org
The inner–outer interaction model (Marusic et al., Science, vol. 329, 2010, pp. 193–196) and
the attached-eddy model (Townsend, Cambridge University Press, 1976) are two …

Contributions of different scales of turbulent motions to the mean wall-shear stress in open channel flows at low-to-moderate Reynolds numbers

Y Duan, Q Zhong, G Wang, P Zhang… - Journal of Fluid …, 2021 - cambridge.org
Smooth-walled open channel flow datasets, covering both the direct numerical simulation
and experimental measurements with a friction Reynolds number wavelength ranges are …