作者
AJ Sojahrood, H Haghi, Raffi Karshafian, Michael C Kolios
发表日期
2021/1/1
期刊
Physics of Fluids
卷号
33
期号
1
出版商
AIP Publishing
简介
Acoustic waves are dissipated when they pass through bubbly media. Dissipation by bubbles takes place through thermal damping (Td), radiation damping (Rd), and damping due to the friction of the liquid (Ld) and friction of the coating (Cd). Knowledge of the contributions of Td, Rd, Ld, and Cd during nonlinear bubble oscillations will help in optimizing bubble and ultrasound exposure parameters for the relevant applications by maximizing a desirable outcome or oscillation pattern. In this work, we investigate the mechanisms of dissipation in bubble oscillations and their contribution to the total damping (W total) in various nonlinear regimes. By using a bifurcation analysis, we have classified nonlinear dynamics of bubbles that are sonicated with their third superharmonic (SuH) and second SuH resonance frequency (f r), pressure dependent resonance frequency (PDf r), f r, subharmonic (SH) resonance (f sh= 2f r …
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