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Sonochemistry involves focusing acoustic energy through cavitation bubbles to in- crease chemical activity. The violent bubble collapses lead to temperatures of sev- eral thousand kelvin, which drive chemical reactions. In previous work, we gave a detailed computational model of a single bubble collapse, taking into account phase change, mass di¬usion, heat di¬usion and chemical reactions. All of these phenomena are important in determining the conditions at collapse. The present work involves development of a much simpler model that includes all the physics relevant to the determination of the reaction products. Comparisons with the more detailed compu- tations are made; the reduced model is found to provide reasonable results. Further- more, it is shown that many of the observed trends in sonochemistry are re®ected in the trends observed in the behaviour of a singlerepresentative' bubble.

A reduced model of cavitation physics for use in sonochemistry