Abstract
To estimate the interfacial velocity in a multicomponent moving boundary problem, existing procedures require an interative technique too be used if a sharp interface methods is employed. The need to use an interactive technique can cause convergence problems; these become more frequent as more components are added. In this paper, two new methods are suggested which allow the velocity of a phase interface to be evaluated directly from the fluxes of the components Wider the assumption of local equilibrium. The methods assume that the interface has a fixed width in which the incoming and outgoing components are distributed in a way that moves the interface while maintaining local equilibrium. Example simulations are presented and results are ill good agreement with established front-tracking simulation software (DICTRA) moreover. the superior convergence of the new methods is demonstrated . (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Original language | English |
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Pages (from-to) | 3754-3760 |
Number of pages | 7 |
Journal | Acta Materialia |
Volume | 56 |
Issue number | 15 |
DOIs | |
Publication status | Published - 1 Jan 2008 |
Keywords
- diffusion
- local equilibrium
- interface migration
- finite difference modelling