CAFE Modeling of Segregation and Structure in Levitated Droplets

Abstract:

The coupled two dimensional (2D) Cellular Automaton (CA) Finite Element (FE) model has been extended based on the recent work by Guillemot et al. [1]. Extensions concern i microsegregation at the scale of the CA cells ii macrosegregation at the scale of the FE mesh based on a remeshing technique. The model is applied to segregation taking place upon single grain nucleation and growth from the centre of a spherical domain. The simulation retrieves the prediction of Heringer et al. [2]. Application to solidification of a spherical Al-4wt%Cu droplet demonstrates its capability to deal with mass exchange by diffusion outside the grain envelope defined by the mushy zone together with back diffusion in the solid [3].

• Periodical: Materials Science Forum (Volume 649)
• Pages: 237-242
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.649.237
• Online since: May 2010
• Authors: Salem Mosbah, Michel Bellet, Charles-André Gandin
• Keywords: Cellular Automaton (CA), Diffusion-Based Segregation, Equiaxed Structure, Finite Element, Modeling, Solidification

References

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