Experimental analysis of the behavior of an oscillating bubble in the vicinity of rigid and elastic surfaces

The study of the interaction of bubbles with rigid and elastic surfaces is of great importance in many engineering and medical applications. In this paper, the bubble behavior adjacent to an elastic surface and also between two rigid and parallel elastic surfaces is studied experimentally. In all cases, the presence of surfaces adjacent to the bubble increased the bubble life time. The bubble becomes a "mushroom" adjacent to an elastic surface in the decay phase and eventually splits into two smaller bubbles. When the bubble was in the middle of two parallel rigid surfaces as well as two parallel elastic surfaces in the collapse phase due to changes in the symmetric local pressure around it, the bubbles took the form of "dumbbell" and "pot-shaped", respectively. In these cases, at the end of the disintegration phase, we saw the bubble split into two smaller bubbles and the formation of two liquid jets toward the surfaces. The bubble nondimensional distance and eccentricity was also studied between rigid and elastic parallel surfaces.