Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
NUMERICAL CONVECTIVE MODEL FOR INTERDENDRITIC LIQUID IN A Sn-39.5 wt% Bi SOLIDIFICATION EXPERIMENT
Submission Author:
Romulo Heringer , SC
Co-Authors:
Leonardo Bernardo, Romulo Heringer
Presenter: Leonardo Bernardo
doi://10.26678/ABCM.COBEM2019.COB2019-2139
Abstract
The present contribution is a numerical simulation of heat, solute and momentum balance for a interdendritic liquid region during solidification of a binary alloy. The control volume is considered in such a way that the control surface coincide with the phase change interface. As a consequence, the solid phase surrounds our system and solute segregation is considered as flux through the frontier, handled via boundary condition. An special case is studied, where the growth direction of columnar structures is not aligned with thermal gradient. The aim of present work was to verify if solutal and thermal convection in a confined interdendritic region can affect both: a) the local solid fraction evolution; b) the asymmetry observed on the growth of dendrite secondary arms in some alloys, which are longer in the side exposed to higher temperatures.
Keywords
Solidification, segregation, Thermal and solutal convection
