Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation
Microjets caused by the cavitation effect in microchannels can affect the motion trajectory of solid particles in microchannels under ultrasonic conditions. The optimal parameters for an observation experiment were obtained through simulations, and an experiment was designed to verify these paramete...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/13/8/1196 |
| _version_ | 1797443411067797504 |
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| author | Mu Yuan Chen Li Jiangqin Ge Qingduo Xu Zhian Li |
| author_facet | Mu Yuan Chen Li Jiangqin Ge Qingduo Xu Zhian Li |
| author_sort | Mu Yuan |
| collection | DOAJ |
| description | Microjets caused by the cavitation effect in microchannels can affect the motion trajectory of solid particles in microchannels under ultrasonic conditions. The optimal parameters for an observation experiment were obtained through simulations, and an experiment was designed to verify these parameters. When the cavitation bubbles collapse in the near-wall area, the solid particles in the microchannel can be displaced along the expected motion trajectory. Using fluent software to simulate the bubble collapse process, it can be seen that, when an ultrasonic sound pressure acts on a bubble near the wall, the pressure causes the top of the bubble wall to sink inward and eventually penetrate the bottom of the bubble wall, forming a high-speed microjet. The maximum speed of the jet can reach nearly 28 m/s, and the liquid near the top of the bubble also moves at a high speed, driving the particles in the liquid towards the wall. A high-speed camera was used to observe the ultrasonic cavitation process of bubbles in the water to verify the simulation results. A comparison of particle motion with and without ultrasonic waves proved the feasibility of using the ultrasonic cavitation effect to guide small particles towards the wall. This method provides a novel experimental basis for changing the fluid layer state in the microchannel and improving precision machining. |
| first_indexed | 2024-03-09T12:55:40Z |
| format | Article |
| id | doaj.art-2643d5aec787444989d0a7ba41351cc4 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-09T12:55:40Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-2643d5aec787444989d0a7ba41351cc42023-11-30T21:59:57ZengMDPI AGMicromachines2072-666X2022-07-01138119610.3390/mi13081196Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic CavitationMu Yuan0Chen Li1Jiangqin Ge2Qingduo Xu3Zhian Li4College of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaCollege of Quality and Safety Engineering, China Jiliang University, Hangzhou 310018, ChinaMicrojets caused by the cavitation effect in microchannels can affect the motion trajectory of solid particles in microchannels under ultrasonic conditions. The optimal parameters for an observation experiment were obtained through simulations, and an experiment was designed to verify these parameters. When the cavitation bubbles collapse in the near-wall area, the solid particles in the microchannel can be displaced along the expected motion trajectory. Using fluent software to simulate the bubble collapse process, it can be seen that, when an ultrasonic sound pressure acts on a bubble near the wall, the pressure causes the top of the bubble wall to sink inward and eventually penetrate the bottom of the bubble wall, forming a high-speed microjet. The maximum speed of the jet can reach nearly 28 m/s, and the liquid near the top of the bubble also moves at a high speed, driving the particles in the liquid towards the wall. A high-speed camera was used to observe the ultrasonic cavitation process of bubbles in the water to verify the simulation results. A comparison of particle motion with and without ultrasonic waves proved the feasibility of using the ultrasonic cavitation effect to guide small particles towards the wall. This method provides a novel experimental basis for changing the fluid layer state in the microchannel and improving precision machining.https://www.mdpi.com/2072-666X/13/8/1196ultrasonic cavitationfine particlesmicrofluidicfluent simulationbubble observation experimentmicrofluidic mixing |
| spellingShingle | Mu Yuan Chen Li Jiangqin Ge Qingduo Xu Zhian Li Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation Micromachines ultrasonic cavitation fine particles microfluidic fluent simulation bubble observation experiment microfluidic mixing |
| title | Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation |
| title_full | Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation |
| title_fullStr | Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation |
| title_full_unstemmed | Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation |
| title_short | Study on the Motion Characteristics of Solid Particles in Fine Flow Channels by Ultrasonic Cavitation |
| title_sort | study on the motion characteristics of solid particles in fine flow channels by ultrasonic cavitation |
| topic | ultrasonic cavitation fine particles microfluidic fluent simulation bubble observation experiment microfluidic mixing |
| url | https://www.mdpi.com/2072-666X/13/8/1196 |
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