Skip navigation

Dendritic growth velocities in undercooled melts under static magnetic fields

Dendritic growth velocities in undercooled melts under static magnetic fields

Kao, Andrew ORCID: 0000-0002-6430-2134, Gao, Jianrong, Liu, Jia and Pericleous, Koulis ORCID: 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

[img]
Preview
PDF (Author's Accepted Manuscript)
14862_Kao_Dendritic_growth_velocities_(conf._proceedings)_AAM_2015.pdf - Accepted Version

Download (254kB)

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 / Department / Research Group: Faculty of Architecture, Computing & Humanities
Faculty of Architecture, Computing & Humanities > Centre for Computer & Computational Science
Faculty of Architecture, Computing & Humanities > Centre for Numerical Modelling & Process Analysis (CNMPA) > Computational Science & Engineering Group (CSEG)
Faculty of Architecture, Computing & Humanities > Department of Mathematical Sciences
Related URLs:
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/14862

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics