Fig.1.21 Instantaneous velocity vector volume (LPT with STB) within the turbulent boundary layer flow, flow velocity color coded, (see Sect.18.2 for details).

More information about Shake-The-Box and 3D Lagrangian Particle Tracking at high Particle Densities (with animation of results as presented in Fig. 1.21) can be found at

http://www.dlr.de/as/en/desktopdefault.aspx/tabid-183/251_read-44975/

Reference

Schröder, A., Schanz, D., Geisler, R., Gesemann, S., Willert, C.E.:

Near-wall turbulence characterization using 4D-PTV “Shake-The-Box”.

In:11th International Symposium on Particle Image Velocimetry - PIV 2015. Santa Barbara (CA) ,USA (2015)