Abstract
Ultrasonic treatment is a hot research topic in the treatment of the melt of metals. Numerical simulation is a useful method to unveil the principles of ultrasonic treatment. In this paper, the Novier-Stoke equations and the cavitation model are coupled to simulate the cavitation during ultrasonic treatment by using Fluent. It is found that as the nucleation site volume fraction increases to a certain degree, there will be a bubble layer surrounding the amplitude transformer, which insulates the effect of ultrasound beyond the bubble blanket. Experiment was carried out, and the simulated results were validated. And the effect of nucleation site volume fraction in water is investigated. The nucleation site volume fraction should be controlled into a certain range to realize uniform cavitation.
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