Study on the Motion Characteristics of Solid Particles in Fine FlowChannel by Ultrasonic Cavitation

doi:10.3901/JME.2022.23.218

Abstract

Abstract: Aiming at the problem of multiphase flow control in micro-channels, the influence of ultrasonic cavitation effect on the movement characteristics of solid particles in micro-channels is studied. Using Fluent finite element technology to simulate the collapse process of cavitation bubbles, the evolution process of bubble depression, wall breaking and collapse when ultrasonic sound pressure acts on the bubble near the wall, and the velocity of the surrounding flow field The vector distribution is studied, and the simulation results show that the collapse of cavitation bubbles can produce high-speed micro-jets directed to the wall with a maximum velocity of 28 m/s, and then determine the optimal parameters for the observation experiment of the subtle flow field; Observation experiments on the evolution of bubbles in the flow channel were carried out and compared with the results of simulation experiments. The observation experiment results showed that the use of ultrasonic cavitation effect can effectively guide the movement of solid particles to the wall of the flow channel, in order to realize the flow field of the fine flow channel. Provide theoretical support for issues such as regulation and improvement of processing accuracy.

Key words: ultrasonic cavitation, fine particles, microfluidic, Fluent simulation, bubble observation experiment, microfluidic mixing

CLC Number:

O429

LI Chen, YUAN Mu, XU Qingduo, GE Jiangqin, LI Zhian. Study on the Motion Characteristics of Solid Particles in Fine FlowChannel by Ultrasonic Cavitation[J]. Journal of Mechanical Engineering, 2022, 58(23): 218-226.

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