Bojarevics, Valdis ORCID: 0000-0002-7326-7748, Roy, Alan Anderson and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2010) Magnetic levitation of large liquid volume. Magnetohydrodynamics, 46 (4). pp. 339-352. ISSN 0024-998X

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Abstract

It is well known from experiments and industrial applications of cold crucible melting that an intense AC magnetic field can be used to levitate large volumes of liquid metal in the terrestrial conditions. The levitation confinement mechanism for large volumes of fluid is considerably different from the case of a small droplet, where surface tension plays a key role in constraining the liquid outflow at the critical bottom point. The dynamic interaction between the oscillatory motion of the free surface and the effects of turbulent flow is analysed using a unified numerical model, which describes the time dependent behaviour of the liquid metal and the magnetic field. The MHD modified k-ω turbulence model is used to describe the mixing and damping properties at smaller scales not resolved by the macro model. The numerical multiphysics simulations suggest that it is possible to levitate a few kilograms of liquid metal in a cold crucible without requiring mechanical support from the container walls. Possible applications to the processing of reactive metals are discussed.

Item Type:	Article
Additional Information:	[1] Paper presented at the 6th International Scientific Colloquium "Modelling for Material Processing", held 16-17 September 2010, Riga, Latvia. [2] Paper published in Magnetohydrodynamics 46, 4 (2010) - Special issue: Selected papers of the 6th International Scientific Colloquium "Modelling for Material Processing" Riga, Latvia, 16-17 September, 2010.
Uncontrolled Keywords:	magnetic levitation
Subjects:	Q Science > QA Mathematics T Technology > TP Chemical technology
Faculty / School / Research Centre / Research Group:	Faculty of Liberal Arts & Sciences
Related URLs:	Publisher
Last Modified:	27 Apr 2020 22:57
URI:	http://gala.gre.ac.uk/id/eprint/4101

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