Journal article
DC negative corona discharge in atmospheric pressure helium: transition from the corona to the 'normal' glow regime
Plasma sources science & technology, v 23(3), pp 35013-21
19 May 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
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.
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Details
- Title
- DC negative corona discharge in atmospheric pressure helium: transition from the corona to the 'normal' glow regime
- Creators
- Nusair Hasan - Drexel UniversityDion S Antao - Massachusetts Institute of TechnologyBakhtier Farouk - Drexel University
- Publication Details
- Plasma sources science & technology, v 23(3), pp 35013-21
- Publisher
- IOP Publishing
- Number of pages
- 16
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000337891900015
- Scopus ID
- 2-s2.0-84901976046
- Other Identifier
- 991019169909304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Physics, Fluids & Plasmas