Experimental study of full field riser hydrodynamics by PIV/DIA coupling

- Full-field experimental data of riser hydrodynamics have been measured.
- Cluster detection mechanisms are discussed.
- Particle clusters are extensively characterized.
- The influence of operating conditions on clusters properties is analyzed.

A full-field hydrodynamic study under riser flow conditions is performed, by using a combined Particle Image Velocimetry (PIV) and Digital Image Analysis (DIA) technique. The employment of a temporal histogram-based method (THM) enables an accurate measurement of the solids volume fraction over the full field of a pseudo-2D riser unit. The full visual access to the riser section enables a complete characterization of the complex transient particulate phase flow patterns. Full-field riser hydrodynamics are quantified at different operating conditions defined by the superficial gas velocity. Under these conditions, a cluster detection method is utilized to characterize the heterogeneity of the riser flow.

Graphical Abstract448