Distribution of solute at solid-liquid interface during solidification of melt

摘要

A model for predicting a distribution coefficient (k(i)) of solute at the solid-liquid (S-L) interface, when the solid layer is growing, is proposed. The interfacial distribution coefficient is expressed as a function of two gradients of the liquid concentration and equilibrium concentration at the S-L interface. The model is applied to the solidification of a simple eutectic binary liquid of lauric acid and myristic acid in an enclosed rectangular box in which a vertical wall is cooled. The impurity-concentration profile in solid is predicted from the direct numerical computations. (C) 1998 American Institute of Physics. [S0021-9606(98)51641-8]. [References: 16]