The effects of laser-sheet misalignment on Stereo-PIV measurements in wall-bounded turbulence

Abstract

The present study attempts to quantify the effects of misalignment of a laser sheet with a calibration target in Stereoscopic-PIV (SPIV) on the measured flow-statistics in wall-bounded turbulence. For this purpose, numerical investigations and SPIV experiments are performed in a fully-developed, turbulent channel flow. The simulations are performed using synthetic particle images generated from Direct Numerical Simulations data of a channel flow [3] in the streamwise × wall-normal plane at friction-Reynolds number equal to 934. Angular misalignments (θ) are imposed about the wall-normal axis and translational misalignments (∆y) along the spanwise direction. The results indicate that for θ = ..