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Display of the two possible cavitation modes, reprinted with permission from [38], Copyright (2013) American Chemical Society. The bubble size oscillation with ultrasonic pressure waves is indicated in the left part of the scheme. Depending on the power, this leads to transient (inertial) cavitation, that is, instable bubbles that collapse after a few oscillation cycles, or stable bubbles that oscillate in size over many more ultrasonic wave cycles.
