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Article

Numerical Analysis of Ultrasonic Nebulizer for Onset Amplitude of Vibration with Atomization Experimental Results

1
Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
2
Department of Computer Science and Information Engineering, Asia University, Taichung 413, Taiwan
3
Zeng Hsing Industrial Co., Taichung 411, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editors: Maksim Pakhomov and Pavel Lobanov
Water 2021, 13(14), 1972; https://doi.org/10.3390/w13141972
Received: 4 June 2021 / Revised: 16 July 2021 / Accepted: 17 July 2021 / Published: 19 July 2021
(This article belongs to the Special Issue Gas-Liquid Two-Phase Flow in the Pipe or Channel)
In this study, the onset amplitude of the initial capillary surface wave for ultrasonic atomization of fluids has been implemented. The design and characterization of 485 kHz microfabricated silicon-based ultrasonic nozzles are presented for the concept of economic energy development. Each nozzle is composed of a silicon resonator and a piezoelectric drive section consisting of three Fourier horns. The required minimum energy to atomize liquid droplets is verified by COMSOL Multiphysics simulation software to clarify experimental data. The simulation study reports a minimum vibrational amplitude (onset) of 0.365 μm at the device bottom under the designated frequency of 485 kHz. The experimental study agrees well with the suggested frequency and the amplitude concerning the corresponding surface vibrational velocity in simulation. While operating, the deionized water was initially atomized into microdroplets at the given electrode voltage of 5.96 V. Microdroplets are steadily and continuously formed after the liquid feeding rate is optimized. This newly designed ultrasonic atomizer facilitates the development of capillary surface wave resonance at a designated frequency. A required vibrational amplitude and finite electric driving voltage promote not only the modern development in the green energy industry, but also the exploration of noninvasive, microencapsulated drug delivery and local spray needs. View Full-Text
Keywords: capillary waves; surface wave; subharmonic; resonance; COMSOL; ultrasonic atomizer capillary waves; surface wave; subharmonic; resonance; COMSOL; ultrasonic atomizer
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MDPI and ACS Style

Song, Y.-L.; Cheng, C.-H.; Reddy, M.K. Numerical Analysis of Ultrasonic Nebulizer for Onset Amplitude of Vibration with Atomization Experimental Results. Water 2021, 13, 1972. https://doi.org/10.3390/w13141972

AMA Style

Song Y-L, Cheng C-H, Reddy MK. Numerical Analysis of Ultrasonic Nebulizer for Onset Amplitude of Vibration with Atomization Experimental Results. Water. 2021; 13(14):1972. https://doi.org/10.3390/w13141972

Chicago/Turabian Style

Song, Yu-Lin, Chih-Hsiao Cheng, and Manoj K. Reddy 2021. "Numerical Analysis of Ultrasonic Nebulizer for Onset Amplitude of Vibration with Atomization Experimental Results" Water 13, no. 14: 1972. https://doi.org/10.3390/w13141972

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