Analysis the Effects of Turbulence Flow, the Heat, and Phases Transfer on Thermal Arrest Time in Casting Process by Computational Fluid Dynamic Method

Abstract

This paper investigates the effects of turbulence flow, the heat, and phases transfer on thermal arrest time in the casting process. In this study, a computational fluid dynamic (CFD) package, Fluent, is used to investigate the phenomena of pure Pb going through the two-dimensional rectangular cavity. The simulation will describe the casting process by using volume of fluid (VOF) model integration with the solidification model in Fluent.The results of the simulation shown that the heat transfer is stable soon, the time of thermal arrest is short; the heat transfer is very low, it will produce imperfections in products; and a highly increasing in the heat alternation increases the solidification time. The result also found that the turbulence flow will reduce when the heat transfer is steady; the turbulence flow occurs strongly, the thermal arrest time will take a more long time. Moreover, the effects of the phases transfer on the thermal arrest time are almost seldom. Finally, both Vinlet = 0.15m/s and Tc= 500K are the most significant parameters for reducing the time of thermal arrest and turbulence flow.