Discussions on the non-equilibrium effects in the quantitative phase field model of binary alloys

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Author(s)

Detail(s)

Original languageEnglish
Article number078101
Journal / PublicationChinese Physics B
Volume19
Issue number7
Publication statusPublished - Jul 2010
Externally publishedYes

Abstract

All the quantitative phase field models try to get rid of the artificial factors of solutal drag, interface diffusion and interface stretch in the diffuse interface. These artificial non-equilibrium effects due to the introducing of diffuse interface are analysed based on the thermodynamic status across the diffuse interface in the quantitative phase field model of binary alloys. Results indicate that the non-equilibrium effects are related to the negative driving force in the local region of solid side across the diffuse interface. The negative driving force results from the fact that the phase field model is derived from equilibrium condition but used to simulate the non-equilibrium solidification process. The interface thickness dependence of the non-equilibrium effects and its restriction on the large scale simulation are also discussed. © 2010 Chinese Physical Society and IOP Publishing Ltd.

Research Area(s)

  • Diffuse interface, Phase field model, Solidification

Bibliographic Note

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