UK Engineering and Physical Sciences Research Council (EPSRC) through the UltraMelt2 (grant EP/R011001/1, EP/R011095/1 and EP/R011044/1) and EcoUltra2D (grant EP/R031401/1, EP/R031665/1, EP/R031819/1, EP/ R031975/1) projects

Beckwith, C

Eskin, D

Khavari, M

Pericleous, K

Priyadarshi, A

Subroto, T

Tzanakis, I

Ultrasonics Sonochemistry

PubMed

Scaling up ultrasonic cavitation melt treatment (UST) requires effective flow management with minimised energy requirements. To this end, container dimensions leading to the resonance play a crucial role in amplifying pressure amplitude for cavitation. To quantify the importance of resonance length during the treatment of liquid aluminium, we used calibrated high-temperature cavitometers (in the range of 8–400 kHz), to measure and record the acoustic pressure profiles inside the cavitation-induced environment of liquid Al and deionized water(used as an analogue to Al) excited at 19.5 kHz. To achieve a comprehensive map of the acoustic pressure field, measurements were conducted at three different cavitometer positions relative to the vibrating sonotrode probe and for a number of resonant and non-resonant container lengths based on the speed of sound in the treated medium. The results showed that the resonance length affected the pressure magnitude in liquid Al in all cavitometer positions, while water showed no sensitivity to resonance length. An important practical application of UST in aluminium processing concerns grain refinement. For this reason, grain size analysis of UST-treated Al-Cu-Zr-Ti alloy was used as an indicator of the melt treatment efficiency. The result showed that the treatment in a resonance tank of L = λAl (the wavelength of sound in Al) gave the best structure refinement as compared to other tested lengths. The data given here contribute to the optimisation of the ultrasonic process in continuous casting, by providing an optimum value for the critical compartment (e.g. in a launder of direct-chill casting) dimension

Khavari, Mohammad

Priyadarshi, Abhinav

Subroto, Tungky

Beckwith, Christopher

Pericleous, Koulis A.

Eskin, Dmitry G.

Tzanakis, Iakovos

Tomsk State University Repository

English

Scale up design study on process vessel dimensions for ultrasonic processing of water and liquid aluminium

Brunel University Research Archive

Scale Up Design Study on Process Vessel Dimensions for Ultrasonic Processing of Water and Liquid Aluminium

Scaling up ultrasonic cavitation melt treatment (UST) requires effective flow management with minimised energy requirements. To this end, container dimensions leading to the resonance play a crucial role in amplifying pressure amplitude for cavitation. To quantify the importance of resonance length during the treatment of liquid aluminium, we used calibrated high-temperature cavitometers (in the range of 8–400 kHz), to measure and record the acoustic pressure profiles inside the cavitation-induced environment of liquid Al and deionized water (used as an analogue to Al) excited at 19.5 kHz. To achieve a comprehensive map of the acoustic pressure field, measurements were conducted at three different cavitometer positions relative to the vibrating sonotrode probe and for a number of resonant and non-resonant container lengths based on the speed of sound in the treated medium. The results showed that the resonance length affected the pressure magnitude in liquid Al in all cavitometer positions, while water showed no sensitivity to resonance length. An important practical application of UST in aluminium processing concerns grain refinement. For this reason, grain size analysis of UST-treated Al-Cu-Zr-Ti alloy was used as an indicator of the melt treatment efficiency. The result showed that the treatment in a resonance tank of  (the wavelength of sound in Al) gave the best structure refinement as compared to other tested lengths. The data given here contribute to the optimisation of the ultrasonic process in continuous casting, by providing an optimum value for the critical compartment (e.g. in a launder of direct-chill casting) dimension

Pericleous, Kyriacos A

Eskin, Dmitry G

Greenwich Academic Literature Archive

Scaling up ultrasonic cavitation melt treatment (UST) requires effective flow management with minimised energy requirements. To this end, container dimensions leading to the resonance play a crucial role in amplifying pressure amplitude for cavitation. To quantify the importance of resonance length during the treatment of liquid aluminium, we used calibrated high-temperature cavitometers (in the range of 8–400 kHz), to measure and record the acoustic pressure profiles inside the cavitation-induced environment of liquid Al and deionized water (used as an analogue to Al) excited at 19.5 kHz. To achieve a comprehensive map of the acoustic pressure field, measurements were conducted at three different cavitometer positions relative to the vibrating sonotrode probe and for a number of resonant and non-resonant container lengths based on the speed of sound in the treated medium. The results showed that the resonance length affected the pressure magnitude in liquid Al in all cavitometer positions, while water showed no sensitivity to resonance length. An important practical application of UST in aluminium processing concerns grain refinement. For this reason, grain size analysis of UST-treated Al-Cu-Zr-Ti alloy was used as an indicator of the melt treatment efficiency. The result showed that the treatment in a resonance tank of L=λAl (the wavelength of sound in Al) gave the best structure refinement as compared to other tested lengths. The data given here contribute to the optimisation of the ultrasonic process in continuous casting, by providing an optimum value for the critical compartment (e.g. in a launder of direct-chill casting) dimension

Mohammad Khavari

Abhinav Priyadarshi

Tungky Subroto

Christopher Beckwith

Koulis Pericleous

Dmitry G. Eskin

Iakovos Tzanakis

Directory of Open Access Journals

http://gala.gre.ac.uk/id/eprint/33170/1/33170_PERICLEOUS_Scale_up_design_study_on_process_vessel_dimensions_for_ultrasonic_processing.pdf

Scale Up Design Study on Process Vessel Dimensions for Ultrasonic Processing of Water and Liquid Aluminium

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Tomsk State University Repository

Brunel University Research Archive

Greenwich Academic Literature Archive

Directory of Open Access Journals