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A Dual Scale Model for Macrosegregation in Alloy Solidification

Pardeshi, R and Singh, AK and Voller, VR and Dutta, P (2011) A Dual Scale Model for Macrosegregation in Alloy Solidification. In: Numerical Heat Transfer Part A, 59 (12). pp. 934-953.

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Official URL: http://www.tandfonline.com/doi/abs/10.1080/1040778...


A numerical approach for coupling the temperature and concentration fields using a micro/macro dual scale model for a solidification problem is presented. The dual scale modeling framework is implemented on a hybrid explicit-implicit solidification scheme. The advantage of this model lies in more accurate consideration of microsegregation occurring at micro-scale using a subgrid model. The model is applied to the case of solidification of a Pb-40% Sn alloy in a rectangular cavity. The present simulation results are compared with the corresponding experimental results reported in the literature, showing improvement in macrosegregation predictions. Subsequently, a comparison of macrosegregation prediction between the results of the present method with those of a parameter model is performed, showing similar trends.

Item Type: Journal Article
Publication: Numerical Heat Transfer Part A
Publisher: Taylor and Francis Group
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 29 Jun 2011 08:56
Last Modified: 29 Jun 2011 08:56
URI: http://eprints.iisc.ac.in/id/eprint/38621

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