Cavitations and Acoustic streaming are the main forces of the energy transformation of the interaction of high power ultrasound with fluids. The technology is widely utilized in surface cleaning of critical components used in different industries.
The technology has evolved throughout the past four decades. Different frequencies were developed for high power ultrasound . Frequency range is from 20 kHz to one MHz. The current technology provides a uniform ultrasonic forces across a liquid in a vessel, which is a major advantage over the earlier technology.
Cavitations and Acoustic streaming are generated in the same fluid but at different intensities. Typically, cavitations with high intensity are formed at low frequencies. The opposite is true for acoustic streaming.
High power ultrasound is used in many industrial applications such as general and precision cleaning, plastic welding, sono-chemistry, spray drying, emulsification, degassing, flavor extractions, homogenization, meat tenderization and removal of bio-contaminants. Ultrahigh frequency ultrasound (Megasonics) with moderate to very low power, is being used in sonar, therapeutic and medical diagnostics and other applications.
Principles of Ultrasonic Precision Cleaning Technology
Ultrasonic Cleaning Mechanism, Sami B. Awad, Handbook for critical cleaning, Editors: Barbara Kanegsberg, Edward Kanegsberg, , p. 217 - 227, 2001.
APPLICATION OF HOT-MELT INK JET PROCESSES http://www.qucosade/fileadmin/data/qucosa/documents/4773/data/kader.pdf
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