SIMPLE aerodynamic configurations under even modest conditions can exhibit complex
flows with a wide range of temporal and spatial features. It has become common practice in …

Advances in experimental techniques and the ever-increasing fidelity of numerical
simulations have led to an abundance of data describing fluid flows. This review discusses a …

Closed-loop turbulence control is a critical enabler of aerodynamic drag reduction, lift
increase, mixing enhancement, and noise reduction. Current and future applications have …

This book is an introduction to machine learning control (MLC), a surprisingly simple model-
free methodology to tame complex nonlinear systems. These systems are assumed to be …

We present the first closed-loop separation control experiment using a novel, model-free
strategy based on genetic programming, which we call 'machine learning control'. The goal …

Data-driven methods have become an essential part of the methodological portfolio of fluid
dynamicists, motivating students and practitioners to gather practical knowledge from a …

Research on active control for the delay of laminar–turbulent transition in boundary layers
has made a significant progress in the last two decades, but the employed strategies have …

Three methods are considered for estimating the downstream evolution of wavepackets in
turbulent jets based on upstream measurements. The parabolised stability equations are …

We present an experimental study of reactive control of turbulent jets, in which we target
axisymmetric coherent structures, known to play a key role in the generation of sound. We …

In boundary-layer flows, one may reduce skin-friction drag by delaying the onset of laminar-
to-turbulent transition via the attenuation of small-amplitude Tollmien–Schlichting (TS) …