Implementation of large scale PIV measurements for wall bounded turbulence at high Reynolds numbers

Here we describe the application of a multiple camera planar particle image velocimetry (PIV) measurement to achieve a large field of view (FOV) in a high Reynolds number turbulent boundary layer. Measurements are performed over a FOV of 0.8m × 0.5m (2.25δ × 1.4δ, where δ denotes the boundary layer thickness) in the streamwise and wall-normal directions respectively in a turbulent boundary layer. The use of a multicamera setup combined with a varying magnification enables a relatively high resolution across the large FOV, with the resolution particulary targeted in the near-wall region where it is most required. Results presented are from an image set of 1000 double-frames acquired at a Reynolds number of Reτ ≈ 8000. Flow statistics from the PIV are quantitatively compared with statistics from hot-wire anemometry at a nominally equivalent Reynolds number to assess the quality of the measurements.