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

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

Khavari, Mohammad, Priyadarshi, Abhinav, Subroto, Tungky, Beckwith, Christopher, Pericleous, Kyriacos A ORCID: 0000-0002-7426-9999, Eskin, Dmitry G and Tzanakis, Iakovos (2021) Scale up design study on process vessel dimensions for ultrasonic processing of water and liquid aluminium. Ultrasonics Sonochemistry, 76:105647. pp. 1-13. ISSN 1350-4177 (doi:https://doi.org/10.1016/j.ultsonch.2021.105647)

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Abstract

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.

Item Type: Article
Uncontrolled Keywords: Ultrasonic processing, acoustic resonance, cavitation, aluminium processing
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Liberal Arts & Sciences
Faculty of Liberal Arts & Sciences > Centre for Computer & Computational Science
Faculty of Liberal Arts & Sciences > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Related URLs:
Last Modified: 02 Sep 2021 14:18
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None
URI: http://gala.gre.ac.uk/id/eprint/33170

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