Details
| Original language | English |
|---|---|
| Article number | 113880 |
| Journal | Sensors and Actuators A: Physical |
| Volume | 346 |
| Early online date | 11 Sept 2022 |
| Publication status | Published - 16 Oct 2022 |
Abstract
Nowadays, ultrasonic cavitation has been successfully used for the degradation of organic pollutants. However, many sonotrodes employed for wastewater treatment are excited to present a longitudinal vibration mode. Thus, the strongest cavitation generally occurs at the tip end of the sonotrodes or the inner walls of ultrasound baths, resulting in severe erosion of the vibrating metal surface caused by ultrasonic cavitation, even though the sonotrodes are made of titanium alloy. In addition, recontamination is possible due to corrosion of the sonotrode. To avoid the above issues, a novel ultrasound system composed of a cylindrical sonotrode and a Langevin-type transducer, is proposed for generating cavitation only in the concentric zone of the cylindrical sonotrode. The first-order longitudinal vibration and the radial vibration are simultaneously stimulated in the Langevin transducer and the cylindrical sonotrode, respectively, to produce the focused cavitation at the concentric zone of the sonotrode. At first, the finite element simulation is conducted to confirm the planned vibration of the ultrasound system and to compute its sound pressure. Subsequently, the prototype of the proposed ultrasound system is manufactured and assembled for vibration measurements. Finally, experimental investigations are carried out on the ultrasound system prototype. By the aluminum foil experiments, the cavitation bubbles occurred in the center of the cylindrical sonotrode. The erosion area increased with the increase of the working power and processing time. After treating the methyl violet solution by ultrasonic cavitation for 60 min, the methyl violet in the solution is reduced by 60%, which certainly will help the development of an appropriate flow system for dye degradation.
Keywords
- Contamination-free, Methyl violet, Ultrasonic cavitation, Ultrasound system, Wastewater treatment
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Instrumentation
- Physics and Astronomy(all)
- Condensed Matter Physics
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Metals and Alloys
- Engineering(all)
- Electrical and Electronic Engineering
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In: Sensors and Actuators A: Physical, Vol. 346, 113880, 16.10.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Simulation and experimental investigation of an ultrasound system with cavitation in concentric zone
AU - Wang, Liang
AU - Bai, Fushi
AU - Feng, Haoren
AU - Jin, Jiamei
AU - Twiefel, Jens
N1 - Funding Information: This research was supported by the National Natural Science Foundation of China (Grant Nos. 51905262 , and U2037603 ), the Natural Science Foundation of Jiangsu Province (Grant No. BK20190398 ), and Postgraduate Research & Practice Innovation Program of Jiangsu Province ( KYCX22–0334 ).
PY - 2022/10/16
Y1 - 2022/10/16
N2 - Nowadays, ultrasonic cavitation has been successfully used for the degradation of organic pollutants. However, many sonotrodes employed for wastewater treatment are excited to present a longitudinal vibration mode. Thus, the strongest cavitation generally occurs at the tip end of the sonotrodes or the inner walls of ultrasound baths, resulting in severe erosion of the vibrating metal surface caused by ultrasonic cavitation, even though the sonotrodes are made of titanium alloy. In addition, recontamination is possible due to corrosion of the sonotrode. To avoid the above issues, a novel ultrasound system composed of a cylindrical sonotrode and a Langevin-type transducer, is proposed for generating cavitation only in the concentric zone of the cylindrical sonotrode. The first-order longitudinal vibration and the radial vibration are simultaneously stimulated in the Langevin transducer and the cylindrical sonotrode, respectively, to produce the focused cavitation at the concentric zone of the sonotrode. At first, the finite element simulation is conducted to confirm the planned vibration of the ultrasound system and to compute its sound pressure. Subsequently, the prototype of the proposed ultrasound system is manufactured and assembled for vibration measurements. Finally, experimental investigations are carried out on the ultrasound system prototype. By the aluminum foil experiments, the cavitation bubbles occurred in the center of the cylindrical sonotrode. The erosion area increased with the increase of the working power and processing time. After treating the methyl violet solution by ultrasonic cavitation for 60 min, the methyl violet in the solution is reduced by 60%, which certainly will help the development of an appropriate flow system for dye degradation.
AB - Nowadays, ultrasonic cavitation has been successfully used for the degradation of organic pollutants. However, many sonotrodes employed for wastewater treatment are excited to present a longitudinal vibration mode. Thus, the strongest cavitation generally occurs at the tip end of the sonotrodes or the inner walls of ultrasound baths, resulting in severe erosion of the vibrating metal surface caused by ultrasonic cavitation, even though the sonotrodes are made of titanium alloy. In addition, recontamination is possible due to corrosion of the sonotrode. To avoid the above issues, a novel ultrasound system composed of a cylindrical sonotrode and a Langevin-type transducer, is proposed for generating cavitation only in the concentric zone of the cylindrical sonotrode. The first-order longitudinal vibration and the radial vibration are simultaneously stimulated in the Langevin transducer and the cylindrical sonotrode, respectively, to produce the focused cavitation at the concentric zone of the sonotrode. At first, the finite element simulation is conducted to confirm the planned vibration of the ultrasound system and to compute its sound pressure. Subsequently, the prototype of the proposed ultrasound system is manufactured and assembled for vibration measurements. Finally, experimental investigations are carried out on the ultrasound system prototype. By the aluminum foil experiments, the cavitation bubbles occurred in the center of the cylindrical sonotrode. The erosion area increased with the increase of the working power and processing time. After treating the methyl violet solution by ultrasonic cavitation for 60 min, the methyl violet in the solution is reduced by 60%, which certainly will help the development of an appropriate flow system for dye degradation.
KW - Contamination-free
KW - Methyl violet
KW - Ultrasonic cavitation
KW - Ultrasound system
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85138204554&partnerID=8YFLogxK
U2 - 10.1016/j.sna.2022.113880
DO - 10.1016/j.sna.2022.113880
M3 - Article
AN - SCOPUS:85138204554
VL - 346
JO - Sensors and Actuators A: Physical
JF - Sensors and Actuators A: Physical
SN - 0924-4247
M1 - 113880
ER -