Canadian Journal of Chemical Engineering, Vol.85, No.5, 669-678, 2007
Influence of bubble kinetic energy on its bouncing during collisions with various interfaces
Collisions and bouncing of the bubbles with water/gas and water/solid interfaces occurring within a time scale of milliseconds were studied. It was shown that the bubble kinetic energy at the moment of collision has a profound influence on the bubble bouncing prior to the bubble rupture at the liquid/gas interface and attachment to the hydrophobic or remaining arrested beneath hydrophilic solid plates. The mechanism of the bubble bouncing was analyzed and degrees of exchange of the kinetic energy into the bubble surface energy were determined. It was found that in the case of solids the degree of the energy conversion was lower for the hydrophobic solid-most probably due to the presence of air.