Instability of the Motion of a Pulsating Bubble in a Sound Field

摘要: This paper describes two related instabilities of spherical bubbles that are set into pulsation by a sound field. One instability is the observed onset erratic dancing trapped in standing wave. occurs when sound‐pressure amplitude exceeds threshold value, and we measured for driven below resonance water isopropyl alcohol. The other instability, which also requires exceed theoretically predicted oscillation bubble shape. was calculated conditions previous experiments theory parametric excitation based on Hill's equation. All results refer to pressure amplitudes less than 0.7 bar frequencies from 23.6 28.3 kHz. From close agreement thresholds shape‐oscillation thresholds, conclude pulsating field caused shape oscillations parametrically excited pulsations.