Effect of driving frequency and power on droplet size atomized by a multimodal transducer
Ultrasonic atomization is used in various applications such as medical devices, material synthesis, and humidity control. To meet the needs of different applications, the required droplet size ranges from a few microns to several hundred microns. In this study, we realized wideband multiple-frequenc...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Ultrasonics Sonochemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417724004152 |
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| author | Weiquan Wang Zhirui Chen Hiroshi Hasegawa Kohsuke Hirano Chikahiro Imashiro Takeshi Morita |
| author_facet | Weiquan Wang Zhirui Chen Hiroshi Hasegawa Kohsuke Hirano Chikahiro Imashiro Takeshi Morita |
| author_sort | Weiquan Wang |
| collection | DOAJ |
| description | Ultrasonic atomization is used in various applications such as medical devices, material synthesis, and humidity control. To meet the needs of different applications, the required droplet size ranges from a few microns to several hundred microns. In this study, we realized wideband multiple-frequency atomization with a multimodal transducer, which could control the size of atomized droplets by switching operating frequencies. A parabolic reflector served to focus the incident ultrasound waves, and a circular plate was employed to excite bending modes. By comparing the results of frequency response experiments with those of finite element simulation, nine different bending modes were acquired in the range of 500–2500 kHz. Then, 734, 949, 1530, and 2063 kHz were selected to examine atomization performance for producing 1–10 μm water droplets. The relationship between the droplet diameter and the operating frequency was clarified. The droplet diameter was found to follow a log-normal distribution. At these four frequencies, the mean droplet diameter was 7.71, 6.57, 4.87, and 4.43 μm, respectively, meaning that the diameter decreased with increasing frequency. The mean droplet diameter decreased with increasing input power at 734 kHz, whereas at 2063 kHz, no significant trend was shown. Furthermore, the atomization rate was found to increase at higher power and exhibited a frequency dependence. These results indicated that the multimodal transducer has promising potential for high-frequency ultrasonic atomization and the capacity to control the droplet size. |
| format | Article |
| id | doaj-art-d76c718531ea4341bc576a4393cc5cfc |
| institution | Kabale University |
| issn | 1350-4177 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj-art-d76c718531ea4341bc576a4393cc5cfc2025-01-11T06:38:42ZengElsevierUltrasonics Sonochemistry1350-41772025-01-01112107166Effect of driving frequency and power on droplet size atomized by a multimodal transducerWeiquan Wang0Zhirui Chen1Hiroshi Hasegawa2Kohsuke Hirano3Chikahiro Imashiro4Takeshi Morita5Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa-no-ha 5-1-5, Kashiwa 277-8563, JapanGraduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8654, JapanDevelopment and Engineering Department, Industrial Cleaning Equipment Division, Kaijo Corporation, Sakae-cho 3-1-5, Hamura 205-8607, JapanDevelopment and Engineering Department, Industrial Cleaning Equipment Division, Kaijo Corporation, Sakae-cho 3-1-5, Hamura 205-8607, JapanGraduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8654, JapanGraduate School of Frontier Sciences, The University of Tokyo, Kashiwa-no-ha 5-1-5, Kashiwa 277-8563, Japan; Graduate School of Engineering, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-8654, Japan; Corresponding author.Ultrasonic atomization is used in various applications such as medical devices, material synthesis, and humidity control. To meet the needs of different applications, the required droplet size ranges from a few microns to several hundred microns. In this study, we realized wideband multiple-frequency atomization with a multimodal transducer, which could control the size of atomized droplets by switching operating frequencies. A parabolic reflector served to focus the incident ultrasound waves, and a circular plate was employed to excite bending modes. By comparing the results of frequency response experiments with those of finite element simulation, nine different bending modes were acquired in the range of 500–2500 kHz. Then, 734, 949, 1530, and 2063 kHz were selected to examine atomization performance for producing 1–10 μm water droplets. The relationship between the droplet diameter and the operating frequency was clarified. The droplet diameter was found to follow a log-normal distribution. At these four frequencies, the mean droplet diameter was 7.71, 6.57, 4.87, and 4.43 μm, respectively, meaning that the diameter decreased with increasing frequency. The mean droplet diameter decreased with increasing input power at 734 kHz, whereas at 2063 kHz, no significant trend was shown. Furthermore, the atomization rate was found to increase at higher power and exhibited a frequency dependence. These results indicated that the multimodal transducer has promising potential for high-frequency ultrasonic atomization and the capacity to control the droplet size.http://www.sciencedirect.com/science/article/pii/S1350417724004152Ultrasonic atomizationAcoustic focusing mechanismMultimodal drivingDroplet diameter distribution |
| spellingShingle | Weiquan Wang Zhirui Chen Hiroshi Hasegawa Kohsuke Hirano Chikahiro Imashiro Takeshi Morita Effect of driving frequency and power on droplet size atomized by a multimodal transducer Ultrasonics Sonochemistry Ultrasonic atomization Acoustic focusing mechanism Multimodal driving Droplet diameter distribution |
| title | Effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| title_full | Effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| title_fullStr | Effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| title_full_unstemmed | Effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| title_short | Effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| title_sort | effect of driving frequency and power on droplet size atomized by a multimodal transducer |
| topic | Ultrasonic atomization Acoustic focusing mechanism Multimodal driving Droplet diameter distribution |
| url | http://www.sciencedirect.com/science/article/pii/S1350417724004152 |
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