Influence of surface-active solutes on the coalescence, clustering, and fragmentation of acoustic bubbles confined in a microspace

摘要: High-speed imaging was used to capture the effect of surface-active solutes on behavior acoustic bubbles, generated in a microspace using low-frequency ultrasound (60 kHz). By confining cavitation within microspace, dynamic such as bubble coalescence, clustering, and fragmentation, could be observed directly. It that bubbles coalesced instantly water; however, presence (n-propanol sodium dodecyl sulfate, SDS) coalescence hindered. Low-density clusters were 1 mM SDS 0.1 M n-propanol. When chloride added solution, extent clustering density enhanced significantly; similar observation made at higher concentration (10 mM). The importance these results understanding multibubble sonoluminescence data published previously has been addressed. collective oscillation cluster consisting different sized images emitting fountain microbubbles have also presented.