In this contribution, we consider the Dynamic Mode Decomposition (DMD) framework as a
purely data-driven tool to investigate both standard and actuated turbulent channel
databases via Direct Numerical Simulation (DNS). Both databases have comparable
Reynolds number Re≈ 3600. The actuation consists in the imposition of a streamwise-
varying sinusoidal spanwise velocity at the wall, known to lead to drag reduction.
Specifically, a composite-based DMD analysis is conducted, with hybrid snapshots …