Abstract
Triboelectric charging on micro-particles is studied analytically and experimentally. The contact analyses on particle-and-particle or particle-and-wall are calculated by using the distinct element method (DEM). To determine amount of charge on all particles contacting with the wall, an equation of triboelectrostatic charging as a function of time is used. In particular, to simplify the charge calculation algorithm, the triboelectric charge between particles is not considered. In experiments, both single particle and multiple particles' triboelectrification cases are conducted, and amount of charge on the particles is measured at each elapsed time. Charge constants of generating or decreasing in the theoretical equation are approximated with the experiment data by the least-square method. The above referenced equation is employed to numerically calculating the multiple particles' charging, and the calculated results are compared with experimental ones in order to verify the validity of the numerical method.
