Bojarevics, V. ORCID: https://orcid.org/0000-0002-7326-7748 and Pericleous, K. ORCID: https://orcid.org/0000-0002-7426-9999 (2001) Magnetic levitation fluid dynamics. Magnetohydrodynamics, 37 (1/2). pp. 93-102. ISSN 0024-998X

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Abstract

This work is concerned with the accurate computation of flow in a rapidly deforming liquid metal droplet, suspended in an AC magnetic field. Intense flow motion due to the induced electromagnetic force distorts dynamically the droplet envelope, which is initially spherical. The relative positional change between the liquid metal surface and the surrounding coil means that fluid flow and magnetic field computations need to be closely coupled. A spectral technique is used to solve this problem, which is assumed axisymmetric. The computed results are compared against a physical experiment and "ideal sphere" analytic solutions. A comparison between the "magnetic pressure" approximation and the full electromagnetic force solutions, shows fundamental differences; the full electromagnetic force solution is necessary for accurate results in most practical applications of this technique. The physical reason for the fundamental discrepancy is the difference in the electromagnetic force representation: only the gradient part of the full force is accounted for in the "magnetic pressure" approximation. Figs 9, Refs 13.

Item Type:	Article
Additional Information:	[1] This issue, Magnetohydrodynamics (2001) 37 (1/2), comprises selected papers from the 4th PAMIR conference held from 18-22 September 2000 in Giens, France. It was given in the MHD Metallurgy and Cristal Growth Section.
Uncontrolled Keywords:	levitated droplets, electromagnetic levitation, MHD
Subjects:	Q Science > QA Mathematics Q Science > QC Physics
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 Organisation
Last Modified:	27 Apr 2020 22:56
URI:	http://gala.gre.ac.uk/id/eprint/497

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