“…In addition, comparing the two cases without and with considering the inter-bubble interaction exhibits obvious increases of the differences in both X max and R res as the ultrasound pressure increases. The presented evidence reveals that the influences of the inter-bubble interaction on both bubble oscillation amplitude and resonant radius are amplified at a higher acoustic pressure, due to a stronger inter-bubble interaction with the acoustic pressure increasing as demonstrated in previous studies [31] , [34] , [37] , [40] . Fig.…”
Section: Resultssupporting
confidence: 78%
“…In practice, multiple UCA microbubbles always exist in the form of bubble cluster and they interact with each other all the time. Similar to the case of a single bubble, extensive numerical research has been devoted to the dynamics of the multi-bubble system, including the radial oscillation [28] , [29] , [30] , translation motion [31] , [32] , bubble deformation [33] , resonance frequency [34] , and the secondary Bjerknes force [35] , [36] for two oscillating bubbles in water, or the radial oscillation and/or translation motion of two interacting bubbles in viscoelastic media [37] , [38] , [39] , [40] , as well as the radial oscillation and resonance characteristics of multiple bubbles in water [41] , [42] , [43] , [44] , etc . The results showed that the inter-bubble interaction can significantly affect the bubble dynamic behaviors, such as enhancing/suppressing oscillation amplitude [28] , [30] , [37] , [44] , forcing translation motion of two bubbles close to/away from each other [35] , [36] , [37] and left shifting the resonance frequency [28] , [34] , etc .…”
“…In addition, comparing the two cases without and with considering the inter-bubble interaction exhibits obvious increases of the differences in both X max and R res as the ultrasound pressure increases. The presented evidence reveals that the influences of the inter-bubble interaction on both bubble oscillation amplitude and resonant radius are amplified at a higher acoustic pressure, due to a stronger inter-bubble interaction with the acoustic pressure increasing as demonstrated in previous studies [31] , [34] , [37] , [40] . Fig.…”
Section: Resultssupporting
confidence: 78%
“…In practice, multiple UCA microbubbles always exist in the form of bubble cluster and they interact with each other all the time. Similar to the case of a single bubble, extensive numerical research has been devoted to the dynamics of the multi-bubble system, including the radial oscillation [28] , [29] , [30] , translation motion [31] , [32] , bubble deformation [33] , resonance frequency [34] , and the secondary Bjerknes force [35] , [36] for two oscillating bubbles in water, or the radial oscillation and/or translation motion of two interacting bubbles in viscoelastic media [37] , [38] , [39] , [40] , as well as the radial oscillation and resonance characteristics of multiple bubbles in water [41] , [42] , [43] , [44] , etc . The results showed that the inter-bubble interaction can significantly affect the bubble dynamic behaviors, such as enhancing/suppressing oscillation amplitude [28] , [30] , [37] , [44] , forcing translation motion of two bubbles close to/away from each other [35] , [36] , [37] and left shifting the resonance frequency [28] , [34] , etc .…”
“…Many investigations have been done on bubble dynamics by considering bubble-bubble interactions in multi-bubble systems, [7,12,15] where a bubble pair is the simplest model. According to our observations, it is found that translational motions of cavitation bubbles are usually accompanied by coalescence and fragmentation of bubbles, and strong interac-tions of bubbles might result in acoustic emissions of negative pressure.…”
Section: Mathematical Modelmentioning
confidence: 99%
“…They found that due to the influence of elastic resistance on bubble motions, dynamical steady states can be obtained . Wang et al [15] studied the effect of burst ultrasound on the translation and pulsation of double bubbles, and found that shortening the time interval of a burst and increas-ing the acoustic amplitude can enhance the translation of bubbles. Thus, bubble motion can be controlled by adjusting the distribution of the acoustic field and environmental parameters.…”
Bubble behaviors are modulated by the primary and secondary acoustic fields in a multi-bubble system. To explore the translational motion of bubbles in cavitation liquids containing high-concentration cavitation nuclei, evolutions of bubbles were recorded by a high-speed camera, and translational trajectories of several representative bubbles were traced. It is found that translational movements of bubbles are always accompanied by the fragmentation and coalescence of bubbles, and for bubbles smaller than 10μm, the possibility of bubble coalescence is enhanced when the spacing of bubbles is less than 30μm. Measured signals and their spectra show the presence of strong negative pressure, broadband noise, and various harmonics, which imply that multiple interactions of bubbles appear in the region of high-intensity cavitation. Due to the strong coupling effect, the interaction between bubbles is random. A simplified triple-bubble model was developed to explore the interaction patterns of bubbles affected by the surrounding bubbles. Patterns of bubble interaction, such as attraction, repulsion, stable spacing, and rebound of bubbles, can be predicted by the theoretical analysis, which is in good agreement with experimental observations. Mass exchange between the liquid and bubbles as well as absorption in the cavitation nuclei also plays an important role in multi-bubble cavitation, which may account for the weakening of the radial oscillations of bubbles.
“…The pressure radiated from oscillating microbubbles was observed to suppress or enlarge the expansion of other bubble depending on the ultrasound frequency, the bubble–bubble distances and the number of bubbles. Wang et al [14] conducted an analytical study of the interaction of two microbubbles focusing on bubble translation and showed that high acoustic frequencies and pressure amplitudes produce fast translational velocity, whereas their effects decrease for bubbles significantly larger than the resonance radius.…”
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
