A modified Pinto-Espinoza magnetization model for studying on motion characteristics of ferromagnetic particles

In this study, a modified Pinto-Espinoza (P-E) magnetization model that has a wider range of applications is proposed based on the conventional magnetization model. This model uses the relative reference frame conversion method to determine the magnetization force experienced by ferromagnetic particles when magnetic fields are applied in any direction. The accuracy of the improved P-E magnetization model is confirmed on the basis of this, and a coupled simulation environment between the discrete element method (DEM) and the finite volume method (FVM) is constructed. Simulated is the motion of ferromagnetic particles under various magnetic field directions and magnetic induction intensities. The particle distribution, particle velocity vector, and particle total energy change were all investigated. It is inferred that the chain formation direction of ferromagnetic particles in the magnetic field is consistent with the magnetic field direction, and they attract each other along the magnetic field direction and repel each other along the vertical magnetic field direction. Changing the intensity of the magnetic induction can effectively ease the particle delamination phenomenon. The faster the chain formation speed increases with increasing magnetic induction intensity, the shorter the time necessary to attain a stable condition.