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Application of the "Full Cavitation Model" to the fundamental study of cavitation in liquid metal processing

Application of the "Full Cavitation Model" to the fundamental study of cavitation in liquid metal processing

Lebon, G. S. B., Pericleous, K. ORCID: 0000-0002-7426-9999, Tzanakis, I. and Eskin, D. (2015) Application of the "Full Cavitation Model" to the fundamental study of cavitation in liquid metal processing. IOP Conference Series: Materials Science and Engineering. IOP Publishing Ltd.. ISSN 1757-8981 (Print), 1757-899X (Online) (doi:https://doi.org/10.1088/1757-899X/72/5/052050)

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Abstract

Ultrasonic cavitation treatment of melt significantly improves the downstream properties and quality of conventional and advanced metallic materials. However, the transfer of this technology has been hindered by difficulties in treating large volumes of liquid metal. To improve the understanding of cavitation processing efficiency, the Full Cavitation Model, which is derived from a reduced form of the Rayleigh-Plesset equation, is modified and applied to the two-phase problem of bubble propagation in liquid melt. Numerical simulations of the sound propagation are performed in the microsecond time scale to predict the maximum and minimum acoustic pressure amplitude fields in the domain. This field is applied to the source term of the bubble transport equation to predict the generation and destruction of cavitation bubbles in a time scale relevant to the fluid flow. The use of baffles to limit flow speed in a launder conduit is studied numerically, to determine the optimum configuration that maximizes the residence time of the liquid in high cavitation activity regions. With this configuration, it is then possible to convert the batch processing of liquid metal into a continuous process. The numerical simulations will be validated against water and aluminium alloy experiments, carried out at Brunel University.

Item Type: Book Section
Additional Information: [1] In: Volume 72 (2015), Forum 5 - Acoustic Cavitation. This volume contains papers from the International Symposium of Cavitation and Multiphase Flow (ISCM 2014), held 18–21 October 2014, Beijing, China. [2] Acknowledgement (funding): The authors are grateful to the UK Engineering and Physical Sciences Research Council (EPSRC) for financial assistance for this research in contract numbers: EP/K00588X/1 and EP/K005804/1. [3] This is an Open Access paper, published under licence by IOP Publishing Ltd. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Uncontrolled Keywords: Homogeneous cavitation, Ultrasonic melt treatment, Cavitation and boiling, Navier-Stokes equations
Subjects: Q Science > QA Mathematics
Q Science > QD Chemistry
Faculty / Department / Research Group: Faculty of Architecture, Computing & Humanities
Faculty of Architecture, Computing & Humanities > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Architecture, Computing & Humanities > Department of Mathematical Sciences
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Last Modified: 21 Mar 2017 11:01
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/12933

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