Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves
This study experimentally investigates the role of cavitation-induced shock waves in initiating and destabilizing capillary (surface) waves on a droplet surface, preceding atomization. Acoustic emissions and interfacial wave dynamics were simultaneously monitored in droplets of different liquids (wa...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Ultrasonics Sonochemistry |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417725000124 |
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| author | Abhinav Priyadarshi Paul Prentice Dmitry Eskin Peter D. Lee Iakovos Tzanakis |
| author_facet | Abhinav Priyadarshi Paul Prentice Dmitry Eskin Peter D. Lee Iakovos Tzanakis |
| author_sort | Abhinav Priyadarshi |
| collection | DOAJ |
| description | This study experimentally investigates the role of cavitation-induced shock waves in initiating and destabilizing capillary (surface) waves on a droplet surface, preceding atomization. Acoustic emissions and interfacial wave dynamics were simultaneously monitored in droplets of different liquids (water, isopropyl alcohol and glycerol), using a calibrated fiber-optic hydrophone and high-speed imaging. Spectral analysis of the hydrophone data revealed distinct subharmonic frequency peaks in the acoustic spectrum correlated with the wavelength of capillary waves, which were optically captured during the onset of atomization from the repetitive imploding bubbles. This finding provides the first direct evidence that the wavelength of the growing surface waves, which governs capillary instability resulting in droplet breakup, is linked to the periodicity of shock waves responsible for the onset of the subharmonic frequencies detected in the acoustic spectra. This work contributes to a deeper understanding of ultrasonic atomization, signifying the role of cavitation and shock waves in the atomization process. |
| format | Article |
| id | doaj-art-c8f5c9c8820c417fb14e58943b0e216e |
| institution | Kabale University |
| issn | 1350-4177 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj-art-c8f5c9c8820c417fb14e58943b0e216e2025-02-01T04:11:38ZengElsevierUltrasonics Sonochemistry1350-41772025-02-01113107233Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock wavesAbhinav Priyadarshi0Paul Prentice1Dmitry Eskin2Peter D. Lee3Iakovos Tzanakis4School of Engineering Computing and Mathematics, Oxford Brookes University, Oxford, UK; Corresponding author.Cavitation Laboratory, Centre for Medical and Industrial Ultrasonics, University of Glasgow, Glasgow, UKBrunel Centre for Advance Solidification Technology (BCAST), Brunel University of London, Uxbridge, UKDepartment of Mechanical Engineering, University College London, London, UK; Research Complex at Harwell, Harwell Campus, Oxfordshire, UKSchool of Engineering Computing and Mathematics, Oxford Brookes University, Oxford, UK; Department of Materials, University of Oxford, Oxford, UKThis study experimentally investigates the role of cavitation-induced shock waves in initiating and destabilizing capillary (surface) waves on a droplet surface, preceding atomization. Acoustic emissions and interfacial wave dynamics were simultaneously monitored in droplets of different liquids (water, isopropyl alcohol and glycerol), using a calibrated fiber-optic hydrophone and high-speed imaging. Spectral analysis of the hydrophone data revealed distinct subharmonic frequency peaks in the acoustic spectrum correlated with the wavelength of capillary waves, which were optically captured during the onset of atomization from the repetitive imploding bubbles. This finding provides the first direct evidence that the wavelength of the growing surface waves, which governs capillary instability resulting in droplet breakup, is linked to the periodicity of shock waves responsible for the onset of the subharmonic frequencies detected in the acoustic spectra. This work contributes to a deeper understanding of ultrasonic atomization, signifying the role of cavitation and shock waves in the atomization process.http://www.sciencedirect.com/science/article/pii/S1350417725000124Ultrasonic atomizationCavitation bubbles, waterIsopropyl alcoholGlycerol, high-speed imagingAcoustic emissionsShock waves |
| spellingShingle | Abhinav Priyadarshi Paul Prentice Dmitry Eskin Peter D. Lee Iakovos Tzanakis Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves Ultrasonics Sonochemistry Ultrasonic atomization Cavitation bubbles, water Isopropyl alcohol Glycerol, high-speed imaging Acoustic emissions Shock waves |
| title | Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves |
| title_full | Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves |
| title_fullStr | Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves |
| title_full_unstemmed | Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves |
| title_short | Synchronized acoustic emission and high-speed imaging of cavitation-induced atomization: The role of shock waves |
| title_sort | synchronized acoustic emission and high speed imaging of cavitation induced atomization the role of shock waves |
| topic | Ultrasonic atomization Cavitation bubbles, water Isopropyl alcohol Glycerol, high-speed imaging Acoustic emissions Shock waves |
| url | http://www.sciencedirect.com/science/article/pii/S1350417725000124 |
| work_keys_str_mv | AT abhinavpriyadarshi synchronizedacousticemissionandhighspeedimagingofcavitationinducedatomizationtheroleofshockwaves AT paulprentice synchronizedacousticemissionandhighspeedimagingofcavitationinducedatomizationtheroleofshockwaves AT dmitryeskin synchronizedacousticemissionandhighspeedimagingofcavitationinducedatomizationtheroleofshockwaves AT peterdlee synchronizedacousticemissionandhighspeedimagingofcavitationinducedatomizationtheroleofshockwaves AT iakovostzanakis synchronizedacousticemissionandhighspeedimagingofcavitationinducedatomizationtheroleofshockwaves |