The formation and amplification of streamwise velocity perturbations induced by cross-
stream disturbances is ubiquitous in shear flows. This disturbance growth mechanism, so …

The linear growth of the spanwise correlation length scale with the distance from the wall in
the logarithmic region of wall-bounded turbulent flows has been understood as a reflection …

Turbulence is the major cause of friction losses in transport processes and it is responsible
for a drastic drag increase in flows over bounding surfaces. While much effort is invested into …

The linear response to stochastic and optimal harmonic forcing of small coherent
perturbations to the turbulent channel mean flow is computed for Reynolds numbers ranging …

It has been recently shown that the energy-containing motions (ie coherent structures) in
turbulent channel flow exist in the form of Townsend's attached eddies by a numerical …

A dynamical systems approach is used to devise a linear estimation tool for channel flow at
a friction Reynolds number of. The estimator uses time-resolved velocity measurements at a …

Numerical experiments that remove turbulent motions wider than reveal significant lack of
energy at long streamwise lengths compared to those of the full simulation. In contrast, the …

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 …

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 …

A new set of exact coherent states in the form of a travelling wave is reported in plane
channel flow. They are continued over a range in, using the eddy-viscosity approach …