Accuracy of Tomo-PIV data for a turbulent round jet

Abstract

Tomographic-PIV experiment were performed in the far field of an axi-symmetric round jet (Re D ≈ 3000) to measure three dimensional velocity fields in a volume of the flow. These 3D data enable the computation of all nine components of the velocity gradient tensor (VGT) at each point in the flow field. The statistical results of Tomo-PIV along the axial direction were assessed by performing a separate set of two-dimensional twocomponent PIV experiments in a "side-view" plane along the jet axis. This "side-view" plane enabled a comparison between the streamwise and spanwise velocities with the Tomo-PIV results as well as components of turbulence intensities in the streamwise and spanwise dire..