Simulation of solutal remelting

Starting with an inter-face between a solid and a melt with compositions fa r off equilibrium, calorimetric experiments were conducted in order to dete rmine melting rates due to solutal supersaturation. Good agreement was foun d for melting rates calculated from a heat balance and from the volume loss of the solid sample. However, simulation calculations using macroscopic an d microscopic models assuming local equilibrium at the interface predict me lting rates that are significantly lower than those determined experimental ly. After introducing a quantitative description of deviations from equilib rium, the simulations predict melting rates that agree well with the ones d etermined by the heat balance and volume loss methods. (C) 2001 Acta Materi alia Inc. Published by Elsevier Science Ltd. All rights reserved.