Phenomena

Ultrasonic Vibrations

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Ultrafast vibrations can break up droplets, mix fluids, and even tear voids in a liquid. Here, the Slow Mo Guys demonstrate each of these using an ultrasonic homogenizer, a piece of lab equipment capable of vibrating 30,000 times a second. At that speed generating cavitation bubbles is trivial, and the flow induced by that cavitation is well-suited to emulsifying otherwise immiscible liquids like oil and water. They also show how a lone droplet gets torn into many microdroplets, a process formally known as atomization. (Image and video credit: The Slow Mo Guys)

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