Experimental study of the surfactant effect on the dynamics of bidispersed bubble cluster

The article presents the results of an experimental study of the process of ascent of a cluster consisting of bubbles of two different sizes in a volume of liquid unlimited by walls in the presence and absence of surfactant in a liquid medium in the ranges of Reynolds numbers Re = 200 ÷ 600 and Re = 0.1 ÷ 50. The effect of the concentration of the surfactant and the cluster parameters (initial concentration, ratio of the number and diameters of bubbles in the cluster) on the qualitative picture of ascent and the velocity of the bidispersed bubble cluster is analyzed. The condition for the existence of the cluster of bidispersed bubbles is experimentally established.