Abstract
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.
Original language | English (US) |
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Pages (from-to) | 934-953 |
Number of pages | 20 |
Journal | Numerical Heat Transfer; Part A: Applications |
Volume | 59 |
Issue number | 12 |
DOIs | |
State | Published - Jan 2011 |