Effects of charge distribution around bubbles on charge induction and transfer to a ball probe in gas–solid fluidized beds

The model of Park et al. (J. Electrostat. 55 (2002) 135) on charge induction and transfer between charged particles surrounding a rising bubble and a ball probe is modified to take into account the charge buildup on particles remote from the bubble, and the particle charge density distribution in the vicinity of the bubble. With particle properties, such as dielectric constant and conductivity, estimated from existing correlations, the model simulation results change only slightly when both the background charge density and a distribution of charge density around a spherical bubble are introduced into the original model. However, significant improvement in agreement between the model and experimental results is achieved when the contributions from the bubble wake and drift carrying highly charged particles are included.