Kao, Andrew ORCID: https://orcid.org/0000-0002-6430-2134, Gao, Jianrong, Liu, Jia and Pericleous, Koulis ORCID: https://orcid.org/0000-0002-7426-9999 (2015) Dendritic growth velocities in undercooled melts under static magnetic fields. In: 8th International Conference on Electromagnetic Processing of Materials. Groupe Élaboration par procédés magnétiques (Saint-Martin d'Hères, Isère). ISBN 9782955386101

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Abstract

Dendritic growth in undercooled melts has been an interesting topic for metallurgists, physicists and mathematicians. In recent years, attention has been focused on the effects of melt flow on dendritic growth. Significant thermoelectric currents form in undercooled growth due to the presence of relatively large thermal gradients. Numerical simulations showed that the application of a static magnetic field exerts a complex influence on melt flow due to Lorentz force, damping and thermoelectrically driven convection, affecting growth kinetics in undercooled metallic melts. To verify the simulated results, bulk melts of high purity nickel were undercooled using the glass fluxing technique under static magnetic fields of up to 6 T. A high-speed camera was used for in situ monitoring of the recalescence process of the undercooled samples. The dendritic growth velocities at different melt undercoolings were calculated by simulating the recorded images of the recalescence process. The measured data confirms the predicted effect of heat and mass transport through thermoelectric magnetohydrodynamics flow on dendritic growth.

Item Type:	Conference Proceedings
Title of Proceedings:	8th International Conference on Electromagnetic Processing of Materials
Additional Information:	8th International Conference on Electromagnetic Processing of Materials, 12-16 October 2015, Cannes, France.
Uncontrolled Keywords:	Dendritic growth, Undercooling, Static magnetic fields, Thermoelectric magnetohydrodynamics
Faculty / School / Research Centre / Research Group:	Faculty of Liberal Arts & Sciences > Computational Science & Engineering Group (CSEH) Faculty of Engineering & Science > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG) Faculty of Engineering & Science > School of Computing & Mathematical Sciences (CMS) Faculty of Engineering & Science
Related URLs:	Organisation
Last Modified:	04 Mar 2022 13:07
URI:	http://gala.gre.ac.uk/id/eprint/14862

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