Charging kinetics of spherical dielectric particles in a unipolar corona field

In this paper, we investigate the charging of spherical dielectric particles in an electric field and unipolar volume charge. A differential equation expressing the charging process is derived and solved numerically using a modified Euler method. The results obtained allow one to determine the charge on the particle for arbitrary values of the particle's radius and permittivity as well as the electric field intensity and surrounding volume charge density. These parameters all influence the charging process considerably. We demonstrate that a stationary particle acquires less charge than a rotating particle. (c) 2005 Elsevier B.V. All rights reserved.