The quest for reductions in fuel consumption and CO 2 emissions in transport has been a
powerful driving force for scientific research into methods that might underpin drag-reducing …

In this article we provide an overview of widely used methods to measure the mean and
fluctuating components of the wall-shear stress in wall-bounded turbulent flows. We first note …

A 50 year journey through flow control strategies that seek to achieve viscous drag reduction
in turbulent boundary layers is presented. These are shown to focus on different …

We present an experimental study of a turbulent boundary layer (TBL) control on a flat plate
using plasma actuators. Three different configurations of the actuators produce spanwise …

While large-scale motions are most energetic in the logarithmic region of a high-Reynolds-
number turbulent boundary layer, they also have an influence in the inner-region. In this …

Drag control using a newly developed spanwise opposed wall-jet forcing (SOJF) method is
studied via direct numerical simulation of the incompressible Navier–Stokes equations in a …

The effect of Reynolds number (Re τ) on drag reduction using spanwise wall oscillation is
studied through direct numerical simulation of incompressible turbulent channel flows with …

It has often been proposed that the formation of large-scale motion (or bulges) is a
consequence of successive mergers and/or growth of near-wall hairpin vortices. In the …

In a recent article, Canton et al.[J. Canton, Phys. Rev. Fluids 1, 081501 (R)(2016) 2469-
990X 10.1103/PhysRevFluids. 1.081501] reported significant drag reduction in turbulent …

This work explores the dynamic response of a turbulent boundary layer to large-scale
reactive opposition control, at a friction Reynolds number of Re τ≈ 2 240. A surface …