Ultrasonic cavitation effect is the dynamical processes in which cavitation bubbles in liquid are forced to grow and collapse due to a certain acoustic pressure, small vacuum bubbles in liquid collapse and cause many phenomenons such as high pressure, high temperature, electrical discharge, luminescence, shock wave, etc. The factors affecting the formation of vacuum void include ultrasonic energy, implosion shock, impact and friction of high-speed fluid, strong reactions, etc.
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