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Studies on transport phenomena during solidification of an aluminum alloy in the presence of linear electromagnetic stirring

Barman, N and Kumar, P and Dutta, Pradip (2009) Studies on transport phenomena during solidification of an aluminum alloy in the presence of linear electromagnetic stirring. In: Journal of Materials Processing Technology, 209 (18-19). pp. 5912-5923.

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Abstract

Numerical and experimental studies on transport phenomena during solidification of an aluminum alloy in the presence of linear electromagnetic stirring are performed. The alloy is electromagnetically stirred to produce semisolid slurry in a cylindrical graphite mould placed in the annulus of a linear electromagnetic stirrer. The mould is cooled at the bottom, such that solidification progresses from the bottom to the top of the cylindrical mould. A numerical model is developed for simulating the transport phenomena associated with the solidification process using a set of single-phase governing equations of mass. momentum, energy. and species conservation. The viscosity variation of the slurry, used in the model, is determined experimentally using a rotary viscometer. The set of governing equations is solved using a pressure-based finite volume technique, along with an enthalpy based phase change algorithm. The numerical study involves prediction of temperature, velocity, species and solid fraction distribution in the mould. Corresponding solidification experiments are performed, with time-temperature history recorded at key locations. The microstructures at various temperature measurement locations in the solidified billet are analyzed. The numerical predictions of temperature variations are in good agreement with experiments, and the predicted flow field evolution correlates well with the microstructures observed at various locations.

Item Type: Journal Article
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Additional Information: Copyright of this article belongs to Elsevier B. V., 2009.
Keywords: Solidification; Semisolid; Rheology; Linear Electromagnetic Stirring; Microstructure
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 21 Dec 2009 05:19
Last Modified: 19 Sep 2010 05:50
URI: http://eprints.iisc.ernet.in/id/eprint/24531

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