A Discrete Element Model for Contact Electrification
Pei, C.; England, D.; Byard, S.; Berchtold, H.; Wu, C.-Y.
Журнал:
Particulate Materials: Synthesis, Characterisation, Processing and Modelling
Дата:
2012
Аннотация:
A discrete element model is developed to analyse contact electrification for particulate systems. Contact electrification between a dielectric particle and a neutral conductive surface is then analysed numerically and compared with the experimental results reported in the literature. It is found that the numerical results are in excellent agreement with the experimental observations demonstrating the discrete element model can accurately predict the dynamic charging process during the impact of particles. It has been demonstrated that, in each single collision, the transferred charge is proportional to the maximum contact area and decreases linearly as the initial charge of the particle increases. In a successive impact process, the accumulation of charge on the particle increases exponentially with the number of collisions and eventually reaches an equilibrium state.
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