3aPA16. Observation of mass transport stability and Faraday instability: Why stable single bubble sonoluminescence is possible.

Session: Wednesday Morning, December 4

Time: 11:50

Abstract:

The region of parameter space (acoustic pressure P[inf a], bubble radius R[inf 0]) in which stable single bubble sonoluminescence (SBSL) occurs in an air--water system is a small fraction of that which is accessible. This is due to the existence of an island of dissolution at high P[inf a] and small R[inf 0]. For dissolved gas concentrations above 50% of saturation, the region lies above the threshold for shape oscillations, and is unobservable. Below 50%, an oscillating bubble is stabilized on the boundary of the island which lies below the shape threshold. SBSL is shown to exist exclusively along this boundary. [Work supported by NASA.]