Stereo PIV measurements of oscillatory plasma forcing in the cross-plane of a channel flow

The present work describes an experimental investigation that applies stereo particle image velocimetry in a cross-plane of turbulent channel flow is additionally perturbed by spanwise oscillatory body forces, induced plasma actuator and designed to mimic the effect wall oscillations. experiment aimed at retrieving forcing-correlated scales stochastic fluctuations for measured cross-plane. first are macroscopic require larger domain while latter benefit higher resolution. Furthermore, extended flow-field dynamic range posed challenge on design, finally leading optimal tradeoff. results unactuated compare well direct numerical simulations Hoyas Jimenez ? (2008), actuated case demonstrates strong near-wall momentum addition modulation streamwise component.