Influence of bubble clustering on multibubble sonoluminescence

Effects of alcohols on multi-bubble sonoluminescence spectra

“…2a that the strongest emission from OH radicals is obtained at 1.8 W, and the maximum value of total MBSL intensity is obtained at 7.3 W although the intensity of OH-radical emission decreases and becomes to be broad. However, the OH-radical emission peak is almost indistinguishable from the continuum at 15.5 W where the MBSL intensity decreases owing to excessive ultrasonic power [13]. At the frequency of 1.0 MHz in Fig.…”

“…[17] reported that the chemical reactions are prominent on dancing bubble which is considered to be low temperature, because the dancing bubble cannot collapse symmetrically. Another reason for the quenching at 15.5 W at 116 kHz is that most of luminescent bubbles are expelled from the pressure antinodes because of too much ultrasonic power [13].…”

A parametric review of sonochemistry: Control and augmentation of sonochemical activity in aqueous solutions

“…Flow can prevent cavitation bubbles from coalescing and clustering by counteracting the primary and secondary Bjerknes forces [158,193]. Without flow, coalescence can cause bubbles to grow and be expelled from the antinode region, becoming inactive.…”

Characterization of HIFU transducers designed for sonochemistry application: Cavitation distribution and quantification

“…In both cases, it is possible to confirm the absence of SCL directly at the focal and in the post-focal zone, immediately downstream from the propagation axis. Several assumptions can be made concerning SCL quenching in these zones, particularly by taking into account previous works on sonoluminescence and SCL [10,[14][15][16]. They observed sudden quenching of the SCL at excessive ultrasonic intensity, as bubble behavior clearly changes.…”