Holographic Particle Image Velocimetry HPIV

FIGURE 8-11 Dual view holographic camera system for holocinematogrqphic velocimeter (Weinstein and Beeler 1987). (Reprinted by permission of NASA.) 

FIGURE 8-12a Velocity vector field in a 3-D space (21x40x11 mm1) of half the vortex ring. Grid interval is 1 mm total number of vectors is 10,824 (Meng and Hussain 1995). (Reprinted by permission of American Institute of Physics.) 

FIGURE 8-12b Complete 3-D vector field volume, from a pipe channel flow, showing the measured vectors along the sides (24.5x24.5x60 mm3) of the measurement volume, based on cross-correlation of particle images. More than 400,000 3-D velocity vectors have been extracted The mean velocity of 0.8 m/s has been subtracted (Barnhart and Adrian 1994). (Reprinted by permission of Optical Society of America.) 

---