Review on the impacts of external pressure on sonochemistry

• Published in: Ultrasonics Sonochemistry Vol. 106; p. 106893
• Main Authors: Merouani, Slimane, Dehane, Aissa, Hamdaoui, Oualid, Yasui, Kyuichi, Ashokkumar, Muthupandian
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.06.2024; Elsevier BV; Elsevier
• Subjects: Acoustic bubble; Acoustics. Sound; Ambient pressure; Bubble temperature; Chemistry; Free radicals; QC221-246; QD1-999; Resonance size; Review; Review Article; Sonochemistry; Bubble temperature; Free radicals; Sonochemistry; Acoustic bubble; Ambient pressure; Resonance size
• ISSN: 1350-4177; 1873-2828; 1873-2828
• DOI: 10.1016/j.ultsonch.2024.106893

•The effect of external pressure on sonochemistry (SC) was comprehensively reviewed.•Experimental observations regarding SC and sonoluminescence were discussed.•Numerical achievements in the field were highlighted and subject to discussion.•The dependence of the optimal static pressure on the sonication conditions was highlighted. The impact of hydrostatic pressure, commonly known as ambient or external pressure, on the phenomenon of sonochemistry and/or sonoluminescence has been extensively investigated through a multitude of experimental and computational studies, all of which have emphasized the crucial role played by this particular parameter. Numerous previous studies have successfully demonstrated the existence of an optimal static pressure for the occurrence of sonoluminescence and multi-bubble or single-bubble sonochemistry. However, despite these findings, a universally accepted value for this critical pressure has not yet been established. In addition, it has been found that the cavitation effect is completely inhibited when the static pressure is either too high or too low. This comprehensive review aims to delve into the primary experimental results and elucidate their significance in relation to hydrostatic pressure. We will then conduct an analysis of numerical calculations, focusing specifically on the influence of external pressure on single bubble sonochemistry. By delving into these calculations, we will be able to gain a deeper understanding of the experimental results and effectively interpret their implications.