Dynamics and concentration variations of fine particles of different sizes in the vicinity of DC conductors

摘要

The dynamics of fine particles of different sizes in the vicinity of DC conductors have been studied. It was observed that the particles aggregated with each other and were distributed in parallel chains on the surface of the conductors. Moreover, an interesting "layering phenomenon" was discovered in the spaces where particles concentrated. Variations in the concentration of particles of different sizes were measured in the sump. A higher voltage and a larger particle size were found to be associated with a faster decrease in the particle concentration. Based on a coupled model of the electric field and the force field, the different forces acting on particles of different sizes were analyzed. Particles of different sizes were observed to reunite into a spindle shape in the calculation space, with large particles playing a leading role. According to the calculation results, the particles around the conductor will settle and reunite, and the gathering of particles accelerates the settlement.