Modeling and analysis of coagulation coefficient of bipolarly charged particles in a composite magnetoelectric field

Abstract

To improve the efficiency of submicron-scale dust coagulation and removal further, a method for the magnetoelectric coagulation of submicron dust is proposed for the first time. When positively and negatively charged particles enter a compound field composed of magnetic field and direct current (DC) electric field at a certain speed (under the combined action of the Lorentz force and electric field force), they undergo spiral motion then collide and coagulate. The mathematical model of the coagulation of bipolarly charged particles in a composite magnetoelectric field is established, and the expression for the coagulation coefficient is obtained. Through the simulation of the coagulation coefficient, it is concluded that for PM1, the coagulation coefficient in the composite magnetoelectric field is increased by more than 20% compared with that in the DC electric field. The coagulation coefficient of bipolarly charged particles in the composite magnetoelectric field is positively correlated with the electric field strength, magnetic induction, and time for collision to occur, while it is negatively correlated with the particle density.