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 …

The conventional mainstream method of polymer additives for reducing drag in pipes is
disadvantageous from certain environmental perspectives. This paper aims to go against the …

Direct numerical simulations of the incompressible Navier–Stokes equations are employed
to study the turbulent wall-shear stress in a turbulent channel flow forced by lateral …

Waves of spanwise velocity imposed at the walls of a plane turbulent channel flow are
studied by direct numerical simulations. We consider sinusoidal waves of spanwise velocity …

The drag reduction properties of a turbulent channel flow modified by spanwise sinusoidal
oscillations of the walls are investigated by direct numerical simulations. The work is based …

This paper exploits the turbulent flow control method using streamwise travelling waves
(Quadrio et al. J. Fluid Mech., vol. 627, 2009, pp. 161–178) to study the effect of Reynolds …

A fundamental problem in the field of turbulent skin-friction drag reduction is to determine the
performance of the available control techniques at high values of the Reynolds number Re …

Wall-based spanwise forcing has been experimentally used with success by Auteri et
al.(Phys. Fluids, vol. 22, 2010, 115103) to obtain large reductions of turbulent skin-friction …

A turbulent boundary layer modified by spanwise wall oscillations is experimentally studied
in a water channel by means of hot-film anemometer and laser Doppler velocimeter. The …

Arrays of dielectric-barrier-discharge plasma actuators have been designed to generate
spanwise travelling waves in the turbulent boundary layer for possible skin-friction drag …