Modelo Numérico para la Solidificación de Esferas Metálicas Obtenidas por Atomización

Abstract

A numerical model for the study of the thermal field and
the kinetics of the solid-liquid interface during solidification of spheres of pured metals with convective
surface cooling, (free boundary problem or one-phase Stefan like problem), is presented. Implicit finite difference moving boundary tracking method, with a variable grid, is used. A satisfactory agreement between numerical solution and asymptotic analytical aproachs (both for ideal and newtonian cooling), is shown. Finally, the model is applied to the production of spherical particulates obtained by inert gas atomization from the melt.