Use of synchronised PIV to measure a pulsed flow velocity field in a discs and doughnuts column

The study presented here deals with the pulsed flow in a discs and doughnuts column. We aim for the understanding of the hydrodynamic properties of the one-phase flow. We experimentaly investigate the pulsation intensity effects on flow structure. Velocity fields from the PIV process reveal that the use of pulsation intensity (Amplitude x Frequency) can only be limited to qualitative analysis. No obvious tendency of the flow structure and intensity could be linked to it. Moreover, an unexpected eddy stemming from the lack of centenring of the packings appeared in the measured velocity fields, highlighting the asymmetry of the flow