A numerical method for the analysis of polydisperse aerosol particles charging in a coaxial electrode system

In this paper, charging kinetics of polydisperse aerosol particles in a corona field of a coaxial electrode system is numerically analyzed for a logarithmic normal distribution of aerosol particle size. The particle charging and the particle current are calculated by using a charging model considering ion concentration and particle mobility. Particle charging profiles under varying ion density and electrical field intensity distributions of the charging chamber were revealed. A low charging profile in the transition region of bipolar corona field was demonstrated in the simulation results.

► A numerical analysis of aerosol particles charging process is proposed.
► Particle charging profiles under a varying ion density are investigated.
► A low charging profile occurring in a bipolar corona field is demonstrated.
► Aerosol particle charging stability in a charging chamber is discussed.