☆ 4.7 Article

Vorticity transport in a turbulent channel flow subjected to streamwise travelling waves

JOURNAL OF FLUID MECHANICS (2023)

Related references

Note: Only part of the references are listed.

Article Computer Science, Interdisciplinary Applications

Multiscale analysis of some shear layers in a fully developed turbulent channel flow

Sedat Tardu

Summary: This study applies multiscale edge detection-wavelet analysis to the velocity field of a fully developed turbulent channel flow, using direct numerical simulations in large computational domains. The results reveal the structure and characteristics of shear layers related to the streamwise and spanwise velocity fields, and discuss their implications for wall turbulence control.

COMPUTERS & FLUIDS (2022)

Add to Collection

Article Physics, Fluids & Plasmas

Reynolds stresses transport in a turbulent channel flow subjected to streamwise traveling waves

Mohammad Umair et al.

Summary: This study analyzes the transport of Reynolds stresses in a turbulent channel flow under streamwise traveling waves using direct numerical simulations, aiming to gain insights into the mechanism of drag reduction. The findings reveal that streamwise traveling waves can lead to larger drag reduction margins compared to simple homogeneous wall oscillations. It is demonstrated that high-amplitude streamwise traveling waves block the intercomponent energy transfer, resulting in the shutdown of near-wall buffer layer dynamics and contributing to the larger drag reduction margins.

PHYSICAL REVIEW FLUIDS (2022)

Add to Collection

Article Physics, Fluids & Plasmas

Coherent near-wall structures and drag reduction by spanwise forcing

Emanuele Gallorini et al.

Summary: This study investigates the effect of streamwise-traveling waves of spanwise wall velocity (StTW) on the quasistreamwise vortices (QSV) in the near-wall region of turbulent channels. The study finds that StTW significantly impact the wall-normal distribution of the vortex population and that the contributions of QSV to the quadrant Reynolds shear stresses change significantly during the control cycle.

PHYSICAL REVIEW FLUIDS (2022)

Add to Collection

Article Multidisciplinary Sciences

An energy-efficient pathway to turbulent drag reduction

Ivan Marusic et al.

Summary: Skin-friction drag can be decreased by oscillatory motion in the surface at high Reynolds numbers, with two distinct pathways for drag reduction identified: one involving frequencies comparable to small-scale eddies and the other involving frequencies comparable to large-scale eddies. The second pathway offers more efficient drag reduction at higher Reynolds numbers, presenting new opportunities for reducing fuel consumption and increasing power generation.

NATURE COMMUNICATIONS (2021)

Add to Collection

Review Engineering, Aerospace

A review of turbulent skin-friction drag reduction by near-wall transverse forcing

Pierre Ricco et al.

Summary: The article reviews research on drag reduction techniques, focusing on manipulating the fluid layer near the surface to achieve drag reduction effects, and covers relevant experiments, simulations, and analyses. These methods can achieve drag reduction margins of around 50% in ideal conditions, providing a valuable foundation for future research on reducing friction drag.

PROGRESS IN AEROSPACE SCIENCES (2021)

Add to Collection

Article Mechanics

3-dimensional particle image velocimetry based evaluation of turbulent skin-friction reduction by spanwise wall oscillation

Kushal U. Kempaiah et al.

PHYSICS OF FLUIDS (2020)

Add to Collection

Article Mathematics, Applied

Response of turbulent enstrophy to sudden implementation of spanwise wall oscillation in channel flow

Mingwei Ge et al.

APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION (2017)

Add to Collection

Article Mechanics

Reynolds-number dependence of turbulent skin-friction drag reduction induced by spanwise forcing

Davide Gatti et al.

JOURNAL OF FLUID MECHANICS (2016)

Add to Collection

Article Mechanics

Concomitance of the local spanwise velocity and production in wall turbulence

F. Sedat Tardu

PHYSICS OF FLUIDS (2016)

Add to Collection

Article Computer Science, Interdisciplinary Applications

Efficiency of high accuracy DRP schemes in direct numerical simulations of incompressible turbulent flows

F. Bauer et al.

COMPUTERS & FLUIDS (2015)

Add to Collection

Article Thermodynamics

The turbulence vorticity as a window to the physics of friction-drag reduction by oscillatory wall motion

L. Agostini et al.

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW (2015)

Add to Collection

Article Mechanics

The effect of Reynolds number on turbulent drag reduction by streamwise travelling waves

Edward Hurst et al.

JOURNAL OF FLUID MECHANICS (2014)

Add to Collection

Article Mechanics

Spanwise oscillatory wall motion in channel flow: drag-reduction mechanisms inferred from DNS-predicted phase-wise property variations at Reτ=1000

L. Agostini et al.

JOURNAL OF FLUID MECHANICS (2014)

Add to Collection

Article Mechanics

Modification of quasi-streamwise vortical structure in a drag-reduced turbulent channel flow with spanwise wall oscillation

Aiko Yakeno et al.

PHYSICS OF FLUIDS (2014)

Add to Collection

Article Mechanics

Performance losses of drag-reducing spanwise forcing at moderate values of the Reynolds number

Davide Gatti et al.

PHYSICS OF FLUIDS (2013)

Add to Collection

Article Mechanics

Parametric forcing approach to rough-wall turbulent channel flow

A. Busse et al.

JOURNAL OF FLUID MECHANICS (2012)

Add to Collection

Article Mechanics

Changes in turbulent dissipation in a channel flow with oscillating walls

Pierre Ricco et al.

JOURNAL OF FLUID MECHANICS (2012)

Add to Collection

Article Mechanics

Near-wall streak modification by spanwise oscillatory wall motion and drag-reduction mechanisms

Emile Touber et al.

JOURNAL OF FLUID MECHANICS (2012)

Add to Collection

Article Mechanics

The laminar generalized Stokes layer and turbulent drag reduction

Maurizio Quadrio et al.

JOURNAL OF FLUID MECHANICS (2011)

Add to Collection

Article Mechanics

Experimental assessment of drag reduction by traveling waves in a turbulent pipe flow

F. Auteri et al.

PHYSICS OF FLUIDS (2010)

Add to Collection

Article Mechanics

Streamwise-travelling waves of spanwise wall velocity for turbulent drag reduction

Maurizio Quadrio et al.

JOURNAL OF FLUID MECHANICS (2009)

Add to Collection

Article Mechanics

Stochastic synchronization of the near wall turbulence

Sedat F. Tardu

PHYSICS OF FLUIDS (2008)

Add to Collection

Article Mechanics

The effect of spanwise wall oscillation on turbulent pipe flow structures resulting in drag reduction

A. Duggleby et al.

PHYSICS OF FLUIDS (2007)

Add to Collection

Article Mechanics

Interpretation of the mechanism associated with turbulent drag reduction in terms of anisotropy invariants

B. Frohnapfel et al.

JOURNAL OF FLUID MECHANICS (2007)

Add to Collection

Article Mechanics

Turbulent stress invariant analysis:: Clarification of existing terminology -: art. no. 088103

AJ Simonsen et al.

PHYSICS OF FLUIDS (2005)

Add to Collection

Article Mechanics

Modification of near-wall turbulence due to spanwise wall oscillations

P Ricco

JOURNAL OF TURBULENCE (2004)

Add to Collection

Article Mechanics

Initial response of a turbulent channel flow to spanwise oscillation of the walls

M Quadrio et al.

JOURNAL OF TURBULENCE (2003)

Add to Collection

Article Mechanics

Control of the viscous sublayer for drag reduction

C Lee et al.

PHYSICS OF FLUIDS (2002)

Add to Collection

© Peeref 2019-2024. All rights reserved.