Influence of liquid compressibility on the dynamics of single bubble sonoluminescence

Modelling lipid-coated microbubbles in focused ultrasound applications at subresonance frequencies

“…However, given the very short time spans of less than 500 ps over which these extreme pressure amplitudes typically occur, as observed in Figure 14b where the shown time interval corresponds to 877 ps, we conjecture that the thermodynamic system is unable to establish a thermodynamic equilibrium. Studies on the modelling of sonoluminescence, where similarly large pressure values and bubble wall velocities are observed, corroborate the overall applicability of the modelling assumptions used in this study to predict the bubble dynamics (Vignoli et al, 2013;Nazari-Mahroo et al, 2018).…”

An alternative technique for determining the number density of acoustic cavitation bubbles in sonochemical reactors

“…The bubble oscillation in Fig. 1 (a) represents the temporal behavior of the bubble radius, which has been extensively discovered experimentally [89] , [90] and numerically by a number of sonochemists, including Yasui [91] , Merouani et al [68] , Kerboua et al [69] , and others [79] , [92] . During the negative rarefaction cycle of the sound wave, the bubble grows from R 0 to R max in 1.219 µs and then abruptly collapses in 0.49 µs, producing the occurrence of a peak temperature around the end of the bubble collapse (around t = 1.71 µs), as shown in Fig.…”

“…The involvement of this phenomenon in computation will be studied in future project. However, many leading research groups in sonochemistry have adopted the single bubble approach (without bubbles interaction) for understanding the overall observed sonochemical effects (sonoluminescence and sonochemistry) in aqueous solutions, with relation to influencing factors [42] , [63] , [64] , [65] , [66] , [67] , [68] , [69] , [70] , [71] , [72] , [73] , [74] , [75] , [76] , [77] , [78] , [79] . Table 2 , Table 3 show the reaction mechanism used to study the internal bubble chemistry for an Ar-CCl 4 -bubble ( Table 2 , 31 reversible reactions) and an O 2 -CCl 4 -bubble ( Table 3 , 29 reversible reactions).…”

“…This approach has been adopted from the work of Toegel et al [75] ( i.e. which is one of the pioneers in sonoluminescence and sonochemistry fields) and it is largely used in several theoretical studies giving interesting results in sonochemistry [60] , [65] , [67] , [75] , [79] , [82] , [83] . This assumption is supported by the short lifetime of the bubble and the very short collapsing time especially at higher ultrasound frequencies, which is the case of our study (200–1078 kHz).…”

A single oscillating bubble in liquids with high Mach number

“…Base on the work of Tomita and Shima, Fujikawa and Akamatsu [27] developed the equation by considering the effects of the non-equilibrium condensation of steam, heat conduction and discontinuity of phase interface temperature. Furthermore, based on a rigorous version of the matched asymptotic expansions method, Lezzi and Prosperetti [28] derived the two-parameter family of the bubble wall motion equation with the second-order Mach number expressed by enthalpy and is widely applied due to its high accuracy [29] , [30] . In addition, the first-order equation is also widely employed because of its simple form [31] , [32] .…”