NUMERICAL SIMULATION OF FLUID FLOW AND HEAT TRANSFER DURING THE INITIAL PHASE LEADING TO STEADY STATE SOLIDIFICATION IN D.C CAST ALIMINIUM ALLOYS

Abstract

In this paper, two dimensional unsteady flow and energy equations are employed for simulating the fluid flow, heat transfer and solidification during direct chill continuous casting of Al-Mg alloy billet. In these processes, the formation of some macro defects such as thermal cracking, hot tearing, surface cracking, etc, has been found to initiate during the starting phase of the operation.