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The effects of Thermoelectric Magnetohydrodynamics in directional solidification under a transverse magnetic field

Kao, A; Cai, B; Lee, PD; Pericleous, K; (2016) The effects of Thermoelectric Magnetohydrodynamics in directional solidification under a transverse magnetic field. Journal of Crystal Growth , 457 pp. 270-274. 10.1016/j.jcrysgro.2016.07.003. Green open access

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Abstract

The mechanism of macrosegregation and modification to dendrite size and spacing from a transverse magnetic field has been modelled through direct numerical simulation. The primary driver for this mechanism was identified as a strong Lorentz force formed in the interdendritic region, which leads to a large scale flow circulation. The microstructure evolution is modified by convective transport of solute and the predicted morphological features compare favourably to experimental data in the literature. The numerical results also give an insight into the magnitude of flow velocities within the interdendritic region.

Type: Article
Title: The effects of Thermoelectric Magnetohydrodynamics in directional solidification under a transverse magnetic field
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.jcrysgro.2016.07.003
Publisher version: https://doi.org/10.1016/j.jcrysgro.2016.07.003
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: A1. Directional solidification, A1. Crystal structure, A1. Mass transfer, A1. Magnetic fields, A. Thermoelectric currents
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10049197
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