☆ 4.4 Article

Coherent near-wall structures and drag reduction by spanwise forcing

PHYSICAL REVIEW FLUIDS (2022)

Related references

Note: Only part of the references are listed.

Article Mechanics

Drag reduction on a transonic airfoil

Maurizio Quadrio et al.

Summary: In this study, flow control for reducing turbulent skin-friction drag is applied to a transonic airfoil, resulting in improved aerodynamic performance. The control method involves inducing spanwise forcing on a portion of the suction side of the airfoil. This not only reduces friction locally, but also modifies shock waves, leading to increased lift and decreased drag. The findings suggest that skin-friction drag reduction can be used as a tool to improve the overall aerodynamics of complex flows.

JOURNAL OF FLUID MECHANICS (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 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

Article Mechanics

The smooth-wall-like behaviour of turbulence over drag-altering surfaces: a unifying virtual-origin framework

Joseph I. Ibrahim et al.

Summary: The virtual origin shift between the mean flow and turbulence is a key parameter for near-wall turbulence. The use of slip-like boundary conditions affects the virtual origins for mean flow and turbulence, determined by the streamwise and wall-normal/spanwise slip lengths. The virtual origin perceived by quasi-streamwise vortices plays a key role in determining the virtual origin for turbulence.

JOURNAL OF FLUID MECHANICS (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

Turbulent drag reduction over curved walls

Jacopo Banchetti et al.

JOURNAL OF FLUID MECHANICS (2020)

Add to Collection

Review Mechanics

Friction-Drag Reduction by Transverse Wall Motion - A Review

Michael A. Leschziner

JOURNAL OF MECHANICS (2020)

Add to Collection

Article Mechanics

Does the choice of the forcing term affect flow statistics in DNS of turbulent channel flow?

Maurizio Quadrio et al.

EUROPEAN JOURNAL OF MECHANICS B-FLUIDS (2016)

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 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

Pattern prediction by linear analysis of turbulent flow with drag reduction by wall oscillation

Olivier Blesbois et al.

JOURNAL OF FLUID MECHANICS (2013)

Add to Collection

Article Mechanics

Modelling turbulent skin-friction control using linearized Navier-Stokes equations

C. A. Duque-Daza 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 Multidisciplinary Sciences

Drag reduction by riblets

Ricardo Garcia-Mayoral et al.

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (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

Laminar and turbulent comparisons for channel flow and flow control

Ivan Marusic et al.

JOURNAL OF FLUID MECHANICS (2007)

Add to Collection

Article Computer Science, Interdisciplinary Applications

A low-cost parallel implementation of direct numerical simulation of wall turbulence

P Luchini et al.

JOURNAL OF COMPUTATIONAL PHYSICS (2006)

Add to Collection

Article Mechanics

On the relationships between local vortex identification schemes

P Chakraborty et al.

JOURNAL OF FLUID MECHANICS (2005)

Add to Collection

Article Mechanics

Critical assessment of turbulent drag reduction through spanwise wall oscillations

M Quadrio et al.

JOURNAL OF FLUID MECHANICS (2004)

Add to Collection

Article Mechanics

Integral space-time scales in turbulent wall flows

M Quadrio et al.

PHYSICS OF FLUIDS (2003)

Add to Collection

Letter Mechanics

Contribution of Reynolds stress distribution to the skin friction in wall-bounded flows

K Fukagata et al.

PHYSICS OF FLUIDS (2002)

Add to Collection

Article Engineering, Aerospace

Drag reduction by spanwise wall oscillation in wall-bounded turbulent flows

JI Choi et al.

AIAA JOURNAL (2002)

Add to Collection

© Peeref 2019-2024. All rights reserved.