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Effect of magnetic field orientation on thermoelectric magnetohydrodynamic interactions in dendritic growth

Effect of magnetic field orientation on thermoelectric magnetohydrodynamic interactions in dendritic growth

Kao, A. and Pericleous, K. (2010) Effect of magnetic field orientation on thermoelectric magnetohydrodynamic interactions in dendritic growth. In: Civil Comp Proceedings. Civil-Comp Press, Dun Eaglais, Stirling, Stirlingshire, UK., pp. 1-20. ISBN 978-1-905088-41-6 (Book), 978-1-905088-40-9 (CD-Rom) ISSN 1759-3433 (doi:10.4203/ccp.94.74)

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Abstract

The focus of this paper is to provide an insight into the complex nature of the flow fields that develop through the application of a magnetic field at different orientations to the direction of dendritic growth. Through the use of linear superposition and exploiting symmetry planes the results show that a variety of different flow fields can be achieved. Some of the features exhibited are a global circulation around the dendrite and circulations at the dendrite tips. How these circulations effect the morphology of the dendrite is investigated when the magnetic field is orientated in the (001) direction. Rotation of the preferential direction of growth and an increase in secondary branching are observed and are a consequence of circulations altering surface free energy. A qualitative agreement of these morphological changes is found between a full 3-dimensional model using a moving mesh and a 2-dimensional model using quasi 3-dimensional approximations.

Item Type: Conference Proceedings
Title of Proceedings: Civil Comp Proceedings
Additional Information: [1] This paper forms part of the published proceedings from the Seventh International Conference on Engineering Computational Technology, held in Valencia, Spain, 14-17 September 2010. It is also part of the FLOW AND ELECTROMAGNETIC FIELDS IN MATERIALS MODELLING SPECIAL SESSION ORGANISED BY K.A. PERICLEOUS
Uncontrolled Keywords: dendritic growth, thermoelectricity, magnetohydrodynamics
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Department of Mathematical Sciences
Related URLs:
Last Modified: 14 Oct 2016 09:10
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/3970

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