Acoustic Cavitation Inception in Water and in Insonated Root Tips.

摘要

An analysis of two aspects of air bubble nucleation is presented. Part I describes the role of particulate matter in acoustic cavitation inception; Part II describes the growth of air bubbles by rectified diffusion in insonated root tips. It was discovered that a modification of some earlier analyses of cavity nucleation from motes lead to a correct prediction of the variation of the acoustic cavitation inception threshold for kilohertz frequencies in water for a range of physical variables. It was also discovered that acoustic emissions from insonated root tips could be attributed to the growth of air bubbles by rectified diffusion. (Author)