Kao, Andrew ORCID: 0000-0002-6430-2134, Pericleous, Koulis A. ORCID: 0000-0002-7426-9999 and Voller, V. (2008) Effects of magnetic fields on crystal growth. In: Schrefler, B.A. and Perego, U., (eds.) 8th World Congress on Computational Mechanics (WCCM8) and 5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008), 30 June - 4 July 2008, Venice, Italy. International Center for Numerical Methods in Engineering (CIMNE), Barcelona, Spain. ISBN 978-84-96736-55-9

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Abstract

The effects of a constant uniform magnetic field on thermoelectric currents during dendritic solidification were investigated using an enthalpy based numerical model. It was found that the resulting Lorentz force generates a complex flow influencing the solidification pattern. Experimental work of material processing under high magnetic field conditions has shown that the microstructure can be significantly altered. There is evidence that these effects can be atrtributed to the Lorentz force created through the thermoelectric magentohydrodynamic interactions.[1,2] However the mechanism of how this occurs is not very well understood. In this paper, our aim is to investigate the flow field created from the Lorentz force and how this influences the morphology of dendritic growth for both pure materials and binary alloys.

Item Type:	Book Section
Additional Information:	This paper was presented at the Minisymposium Computational Electro-Magneto-Hydro-Dynamics (EMHD) I (one of c.170 taking place at the event), and forms part of the Proceedings of the 8th World Congress on Computational Mechanics (WCCM8) and 5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008), which took place 30 June - 4 July 2008, in Venice, Italy. An extended version of the paper - with additional author, Georgi Djambazov - was presented and forms part of the Proceedings of the 7th International PAMIR Conference: Fundamental and Applied MHD and COST P17 Annual Workshop 2008, held at Presqu'Île de Giens, France, 8-12 September 2008. Suspect paper may also have been subsequently published, under revised title 'Thermoelectric MHD in dendritic solidification,' in Magnetohydrodynamics 45, 3 (2009), Special issue: Selected papers of the 7th pamir International Conference Fundamental and Applied MHD Giens, France, September 8-12, 2008 (ISSN: 0024-998X (print)). (Official URL: http://mhd.sal.lv/contents/2009/3/index.html).
Uncontrolled Keywords:	dendritic growth, magnetohydrodynamics, multiphyics problems, modelling
Subjects:	Q Science > QD Chemistry Q Science > QA Mathematics
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:	Organisation Organisation Publisher
Last Modified:	05 Mar 2019 12:25
URI:	http://gala.gre.ac.uk/id/eprint/1503

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