Numerical modelling for bipolar charge transport in polyethylene under high DC applied voltage

In this paper, a bipolar transport model for low-density polyethylene under DC voltage, theorecale formulation of the model is based on the poisson´s equation and continuity, transport equation. As well as on the appropriate models for injection and take into account trapping and detrapping and recombination mechanism. The numerical model are chosen, for the resolution step, we have applied the finite element method for resolve poisson´s equation, Leonard model applied for continuity equation without taking into account source term. Runge-Kutta method on the high precision for determining mobile and trapped charge local density within the sample. Finally, our model determining conduction and displacement current density and extrenal current density.