Three-phase numerical modeling for equiaxed solidification of Sn-10 wt.%Pb alloy under forced convection driven by electromagnetic force

Abstract

A three-phase equiaxed solidification model where macroscale heat transfer and fluid flow are coupled with microscale nucleation and dendrite growth, is applied to the simulation of the macrosegregation in binary alloy solidification subjected to the electromagnetic stirring. The investigated experimental solidification case is conducted in a cavity which has a good control of the thermal boundary conditions. The proposed model uses a double time step scheme to accelerate the solution. Electromagnetic force is introduced as a source term into momentum equation in analytical form. To account for the friction from the side walls, a 2D1/2 flow model is applied to a three-dimensional experimental configuration. A comparison between the results of simulation and experimental ones is made.