title: Characterization of acoustic emissions resulting from particle collision with a stationary bubble.
abstract: The present work characterizes the acoustic emissions resulting from the collision of a particle driven under gravity with a captive bubble. Conventional methods to investigate the bubble particle collision interaction model measure a descriptive parameter known as the collision time. During such a collision, particle impact may cause a strong deformation and a following oscillation of the bubble-particle interface generates detectable passive acoustic emissions (AE). Experiments and models presented show that the AE frequency monotonically decreases with the particle radius and is independent of the impact velocity, whereas the AE amplitude has a more complicated relationship with impact parameters.
authors: Research School of Engineering, College of Engineering and Computer Science, The Australian National University, Building 115, Corner North and Daley Roads, Canberra, Australian Capital Territory 0200, Australia. wen.zhang@anu.edu.au
authors: Wen
authors: W
authors: Zhang
authors: Steven J
authors: SJ
authors: Spencer
authors: Peter
authors: P
authors: Coghill
mesh_terms: D000162:Acoustics; D005740:Gases; D006112:Gravitation; D008962:Models, Theoretical; D009038:Motion; D009991:Oscillometry; D010316:Particle Size; D013016:Sound; D013018:Sound Spectrography; D013499:Surface Properties; D013997:Time Factors
chemical_list: D005740:Gases