Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Influence of Convection on the Interfacial Heat Transfer Coefficient in Upward Solidification of Hypoeutectic Al-Si Alloys
Submission Author:
Erb Lins , PA , Brazil
Co-Authors:
Erb Lins, Gianfranco Stieven, Daniele Soares, EDILMA OLIVEIRA
Presenter: Gianfranco Stieven
doi://10.26678/ABCM.COBEM2017.COB17-5321
Abstract
The study of the variables that influences the heat transfer coefficient applied on directional solidification of metal alloys are of major relevance due its effect on the macrostructure and the microstructure of the castings. Based on the literature, papers that involves upward solidification do not exposes attention in the use of momentum conservation equations based on the hypotheses of non-convection in upward solidification. That research explains that the gravity vector, which is vectorially opposite from the development of the solid, prevent the convection ahead the front of solidification. However, no paper was made in order to evaluate the convection on the phenomenon. This paper aims to propose an analysis of the upward solidification phenomenon using the software ANSYS®FLUENT in order to identify the relevance of the convection on this phenomenon. For this propose, was considered the binaries Al-3wt.%Si and Al-9wt.%Si. The results show that the magnitude of the convection is more relevant in the same proportion of the increase of solute in the solvent.
Keywords
Upward Solidification, al-si alloys, ANSYS®FLUENT, Heat transfer coefficient, Convection
