DC negative corona discharge in atmospheric pressure helium: transition from the corona to the 'normal' glow regime Academic Article uri icon


  • Direct current (dc) negative corona discharges in atmospheric pressure helium are simulated via detailed numerical modeling. Simulations are conducted to characterize the discharges in atmospheric helium for a pin plate electrode configuration. A self-consistent two-dimensional hybrid model is developed to simulate the discharges and the model predictions are validated with experimental measurements. The discharge model considered consists of momentum and energy conservation equations for a multi-component (electrons, ions, excited species and neutrals) gas mixture, conservation equations for each component of the mixture and state relations. A drift-diffusion approximation for the electron and the ion fluxes is used. A model for the external circuit driving the discharge is also considered and solved along with the discharge model. Many of the key features of a negative corona discharge, namely non-linear current-voltage characteristics, spatially flat cathode current density and glow-like discharge in the high current regime are displayed in the predictions. A transition to the 'normal' glow discharge from the corona discharge regime is also observed. The transition is identified from the calculated current-voltage characteristic curve and is characterized by the radial growth of the negative glow and the engulfment of the cathode wire. 2014 IOP Publishing Ltd.

published proceedings


altmetric score

  • 0.5

author list (cited authors)

  • Hasan, N., Antao, D. S., & Farouk, B.

citation count

  • 12

complete list of authors

  • Hasan, Nusair||Antao, Dion S||Farouk, Bakhtier

publication date

  • January 2014