How does an ultrasound wave effect the thermal chemical reactivity
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The Chemical Effects of Ultrasound - Jstor
by KS Suslick · 1989 · Cited by 1125 · Related articles
Ul trasound can increase the reactivity of metal powders by more than 100,000 times. Ultrasound can drive metal par ticles together at such high speeds that they melt at the point of collision, and ultrasound can generate micro scopic flames in cold liquids.
Ultrasound refers to sound waves above the human hearing range. The physical effects of ultrasound include the turbulence associated with cavitational bubble collapse, microjetting, and the streaming movement of cavitational microbubbles to the pressure antinodes of a standing wave field. These physical effects are strongest near to fluid/solid and fluid/fluid boundaries, which mean that ultrasound is extremely effective in enhancing heat and mass transfer within such boundary layers. Chemical effects arise from free radical production during transient cavitational collapse of bubbles.