A numerical model of MHD separation of inclusions from molten aluminum

grantor: University of TorontoAn electromagnetic device is proposed for the separation of inclusions from Aluminum. The device utilizes a magnetic structure that generates a current within the flow regime. The Electromagnetic force field exerts a pressure upon the inclusions which propels them towards a wall where they accumulate and are prevented from re-entering the stream. The thesis presents two mathematical models which are used to reveal the fundamental mechanisms of inclusion removal from a liquid metal stream. The first of these is a simplified model which assumes a total independence between magnetic and flow fields. The second is a finite element model for fluid flow which is used to confirm the overall features of the simplified approach. The main results of the thesis show that electromagnetic effects can be used for the removal of inclusions from a liquid metal stream. However, the magnitudes of excitation currents are high, and the geometry of the device fundamentally affects the efficiency of filtration.M.A.Sc