Bojarevics, Valdis ORCID: 0000-0002-7326-7748 and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2003) Modelling electromagnetically levitated liquid droplet oscillations. ISIJ International, 43 (6). pp. 890-898. ISSN 0915-1559 (Print), 1347-5460 (Online) (doi:https://doi.org/10.2355/isijinternational.43.890)

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Abstract

This work comprises accurate computational analysis of levitated liquid droplet oscillations in AC and DC magnetic fields. The AC magnetic field interacting with the induced electric current within the liquid metal droplet generates intense fluid flow and the coupled free surface oscillations. The pseudo-spectral technique is used to solve the turbulent fluid flow equations for the continuously dynamically transformed axisymmetric fluid volume. The volume electromagnetic force distribution is updated with the shape and position change. We start with the ideal fluid test case for undamped Rayleigh frequency oscillations in the absence of gravity, and then add the viscous and the DC magnetic field damping. The oscillation frequency spectra are further analysed for droplets levitated against gravity in AC and DC magnetic fields at various combinations. In the extreme case electrically poorly conducting, diamagnetic droplet (water) levitation dynamics are simulated. Applications are aimed at pure electromagnetic material processing techniques and the material properties measurements in uncontaminated conditions.

Item Type:	Article
Additional Information:	[1] Accepted: 8 January 2003. [2] First published: 2003. [3] Published online: 31 May 2007. [4] Paper published in ISIJ International (2003), Volume 43, Issue 6 - Special Issue on "Advanced Application of Electromagnetic Force to Materials Processing."
Uncontrolled Keywords:	electromagnetic material processing, magnetic levitation, free surface dynamics, turbulent fluid flow
Subjects:	Q Science > QA Mathematics Q Science > QC Physics T Technology > TJ Mechanical engineering and machinery
Pre-2014 Departments:	School of Computing & Mathematical Sciences School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group School of Computing & Mathematical Sciences > Department of Computer Systems Technology School of Computing & Mathematical Sciences > Department of Mathematical Sciences
Related URLs:	Publisher Publisher
Last Modified:	27 Apr 2020 22:56
URI:	http://gala.gre.ac.uk/id/eprint/665

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