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TEMHD effects on solidification under microgravity conditions

TEMHD effects on solidification under microgravity conditions

Kao, Andrew ORCID: 0000-0002-6430-2134 and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2012) TEMHD effects on solidification under microgravity conditions. In: TMS 2012: The Minerals, Metals & Materials Society, 11-15 March 2012, Orlando USA. TMS Publications.

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Abstract

An unexplored potential exists to control microstructure evolution through the use of external DC magnetic fields. Thermoelectric currents form during solidification and interact with this external field to drive microscopic fluid dynamics within the inter-dendritic region. The convective heat and mass transport can lead to profound changes on the dendritic structure. In this paper the effect of high magnetic fields is demonstrated through the use of both 3-dimensional and 2-dimensional numerical models. The results show that the application of a magnetic field causes significant disruption to the dendritic morphology. Investigation into the underlying mechanism gives initial indicators of how external magnetic fields can either lead to unexpected growth behaviour, or alternatively can be used to control the evolution of microstructure in undercooled melts as encountered in levitated droplet solidification

Item Type: Conference Proceedings
Title of Proceedings: TMS 2012: The Minerals, Metals & Materials Society, 11-15 March 2012, Orlando USA
Uncontrolled Keywords: Dendritic Growth, Solidification, Thermoelectricity, Magnetohydrodynamics, Undercooling
Pre-2014 Departments: School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group
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Last Modified: 02 Mar 2019 15:53
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/14859

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