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Experimental Investigations of Rise Behavior of Monodispersed/Polydispersed Bubbly Flows in Quiescent Liquids

The predictive capabilities of continuum CFD models to simulate large-scale dispersed gas—liquid flows depend on the closures used to estimate the interphase coupling forces. The present manuscript shows that different corrections that are applied to correct the drag force for multiple bubble systems lead to different predictions as the gas volume fraction is increased. In the present work, experimental investigations of monodispersed and polydispersed bubbles of different diameters (1.2 ≤ d B ≤ 7.5 mm) rising in quiescent water (0.19 ≤ Eo ≤ 8.72; log Mo = -10.5) at different gas volume fractions (0.01 0.1, the drag coefficient were found to be independent of α G . Further, the rise behavior of poly dispersed bubbles was also investigated.