http://www.dem-solutions.com/support/files/examples/ChargedParticle.zip
This is a simple Particle Body Force model in which charged particles experience an oscillating electric field as they travel between two plates towards an attractor. The example model consists of a particle gun, parallel plates and a point attractor. The gun fires charged particles at short intervals between the parallel plates towards the attractor. The path of travel of the particles varies according to the direction and strength of the electric field and proximity to the attractor.

Please take a look at the code for your own project and remember to come back and post up any modifications or code snippets which will help other users along the way. Feel free to use this forum for asking questions about this contact model.
DEM Solutions Team.