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A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth / Shiyan Pan in Acta materialia, Vol. 58 N° 1 (Janvier 2010) 

Public ISBD [article]  in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 340–352 Titre : A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth Type de document : texte imprimé Auteurs : Shiyan Pan, Auteur ; Mingfang Zhu, Auteur Année de publication : 2010 Article en page(s) : pp. 340–352 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Microstructure  modeling  Solutal  dendritic  growth  Weighted  mean  curvature  Three  dimensions Résumé : A three-dimensional (3-D) sharp interface model is developed to simulate the solutal dendritic growth in the low Péclet number regime. The model adopts a previously proposed solutal equilibrium approach to calculate the evolution of the solid/liquid interface. To describe specific crystallographic orientations of 3-D dendritic growth, a weighted mean curvature algorithm incorporated with the anisotropy of surface energy is proposed, allowing the simulation of 3-D dendrites with various orientations in a straightforward manner. The model validation is performed by comparing the simulations with the analytical predictions and experimental data for both single and multi-dendritic growth, which demonstrates the quantitative capabilities of the proposed model. The model efficiently reproduces realistic 3-D multi-equiaxed and columnar dendrites with various orientations and well-developed side branches. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006089 [article] A three-dimensional sharp interface model for the quantitative simulation of solutal dendritic growth [texte imprimé] / Shiyan Pan, Auteur ; Mingfang Zhu, Auteur . - 2010 . - pp. 340–352. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 1 (Janvier 2010) . - pp. 340–352 Mots-clés : Microstructure  modeling  Solutal  dendritic  growth  Weighted  mean  curvature  Three  dimensions Résumé : A three-dimensional (3-D) sharp interface model is developed to simulate the solutal dendritic growth in the low Péclet number regime. The model adopts a previously proposed solutal equilibrium approach to calculate the evolution of the solid/liquid interface. To describe specific crystallographic orientations of 3-D dendritic growth, a weighted mean curvature algorithm incorporated with the anisotropy of surface energy is proposed, allowing the simulation of 3-D dendrites with various orientations in a straightforward manner. The model validation is performed by comparing the simulations with the analytical predictions and experimental data for both single and multi-dendritic growth, which demonstrates the quantitative capabilities of the proposed model. The model efficiently reproduces realistic 3-D multi-equiaxed and columnar dendrites with various orientations and well-developed side branches. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645409006089