5. Conclusions

In this study, the descent motion of planar particles in quiescent flow and under turbulence effects has been investigated. Experiments were conducted to explore the motion of irregular planar particles in quiescent flow always with a equivalent disk (same frontal area) as a baseline. Then, a zero-mean flow turbulence facility was designed and built; and the flow in the central region of the facility was characterized non only for the statistically stationary case but for free decaying turbulence. Last, the descent of inertial disks under zero-mean flow turbulence was investigated. The study was conducted as an experimental work using particle tracking, volumetric velocimetry (V3V) and planar PIV. The outcomes of the study will be summarised below.