Development of Highly Efficient Lamb Wave Transducers toward Dual-Surface Simultaneous Atomization
Abstract
:1. Introduction
2. Simulation and Design of SAW Transducers
2.1. Governing Equations
2.2. Electromechanical Coupling Coefficient
2.3. COMSOL Simulation
2.4. Design of SAW Transducers
3. Experimental Section
3.1. Fabrication of SAW Transducers
3.2. Experimental Setup
4. Results and Discussion
5. Conclusions
- We perceive that the electromechanical coupling coefficient of A0-mode Lamb waves can be as high as that of Rayleigh waves when the ratio , and in this case, the S0-mode Lamb wave has degenerated due to its being lower than 0.5%.
- A0-mode Lamb waves propagation characteristics are not immutable with the change in . When , the acoustic wavelength is smaller than the thickness, which means one whole acoustic wave has not completed its motion, and the bottom surface may hold a stronger driving ability. When , the acoustic wavelength is larger than the thickness, and the completed acoustic waves may have a strengthening driving ability on the top surface.
- Compared to Rayleigh waves, Lamb waves can obtain a dual-surface simultaneous atomization phenomenon when putting the paper strips on the outside the IDT aperture, at the edge of the piezoelectric plate. This can be attributed to the fact that the piezoelectric plate can provide a commensurate amplitude acoustic wave vibration on the dual-surface. During the process of dual-surface simultaneous atomization, the liquid thin film is not in front of the bulk liquid meniscus as usual, instead appearing on the inside of the IDT aperture.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Abbreviations
SAW | Surface acoustic wave |
IDT | Interdigital transducer |
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Electrode Width (m) | Electrode Height (nm) | Plate Thickness (m) | |
---|---|---|---|
Periodic Structural Parameters | * 24:1:175 | 150 | 350 |
, | |||
Mechanical Boundary Conditions Electrical Boundary Conditions | Periodicity Periodicity | Free Free or metalized | Free Free |
Terms | Values |
---|---|
IDT pairs | 30 |
IDT aperture | 3 mm |
Thickness | 350 μm |
Wavelength | 132, 280, 320, 352, and 468 μm |
2.65, 1.25, 1.09, 0.99, and 0.75 |
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Gai, C.; Ma, Q.; Ning, J.; Ding, Y.; Lei, Y.; Li, H.; Guo, C.; Hu, H. Development of Highly Efficient Lamb Wave Transducers toward Dual-Surface Simultaneous Atomization. Sensors 2024, 24, 5607. https://doi.org/10.3390/s24175607
Gai C, Ma Q, Ning J, Ding Y, Lei Y, Li H, Guo C, Hu H. Development of Highly Efficient Lamb Wave Transducers toward Dual-Surface Simultaneous Atomization. Sensors. 2024; 24(17):5607. https://doi.org/10.3390/s24175607
Chicago/Turabian StyleGai, Chenhui, Qinghe Ma, Jia Ning, Yizhan Ding, Yulin Lei, Honggeng Li, Chunhua Guo, and Hong Hu. 2024. "Development of Highly Efficient Lamb Wave Transducers toward Dual-Surface Simultaneous Atomization" Sensors 24, no. 17: 5607. https://doi.org/10.3390/s24175607