Numerical Simulation and Design of Multi-field Coupling for Nonferrous Metals DC Electromagnetic Stirring

Abstract

Abstract In the melting process of non-ferrous metals, melt stirring is one of the most important processes. In this paper, a new type of EMS (Electromagnetic Stirring) device with long service life and low energy consumption is designed based on the basic equations of Maxwell electromagnetics combined with finite element method. The effect of the designed EMS on the non-ferrous metal melt is studied. The 3D numerical model of multi-field coupling of DC EMS device is established. The distribution and morphological characteristics of magnetic field and flow field are simulated by ANSYS software. Through the streamline distribution and the volume fraction cloud diagram analysis, it is found that the melt flow state and the Si composition distribution are different under different stirring speed especially for early time, but when the time is long enough, the melt will be stirred evenly. During the stirring, the alternating magnetic field can form the circumferential electromagnetic torque, through which the non-ferrous metal melt can move. It is found that the circulating flow inside the melt and the shear flow near the groove wall are in conflict with each other. This phenomenon creates favorable conditions for the collision, friction and mixing of non-ferrous metals and reinforcement groups.