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Spatial uniformity of atmospheric pressure discharges: a simulation study

Iqbal, Muhammad Munawar orcid logoORCID: 0000-0002-8579-4828 and Turner, Miles M. orcid logoORCID: 0000-0001-9713-6198 (2014) Spatial uniformity of atmospheric pressure discharges: a simulation study. Contributions to Plasma Physics, 54 (9). pp. 756-771. ISSN 0863-1042

Abstract
Spatial uniformity is important in most applications of dielectric barrier discharges operating at atmospheric pressure. However, such uniformity is not easily achieved. Under many conditions, a filamentary structure usually develops. In this paper, we employ a two-dimensional self-consistent fluid model to explore the influence of several factors on the evolution of spatial structure of dielectric barrier discharges. In particular, we contrast the behaviour of discharges in pure helium and He-N2 gas mixture, which represent the reduction in breakdown voltage of gas during the evolvement of uniform glow discharge plasma. The transformation from filamentary to uniform mode of discharge plasma is analyzed by the phenomenon of coalescence of filaments and we investigate the effect of several external discharge parameters, such as driving frequency and effect of overvoltage, and the dielectric constant of the barrier material for the uniform and filamentary discharge plasmas. This simulation study is useful to describe the spatio-temporal profiles of electrons density in different phases of the filamentary, uniform Townsend and glow discharge regimes under various constraints.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:Atmospheric Pressure Discharges; Modelling; Dielectric barrier discharges
Subjects:Physical Sciences > Physics
Physical Sciences > Plasmas
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Research Initiatives and Centres > National Centre for Plasma Science and Technology (NCPST)
Publisher:John Wiley & Sons
Official URL:https://doi.org/10.1002/ctpp.201400002
Copyright Information:© 2014 John Wiley & Sons
Funders:Science Foundation Ireland (SFI) grants 07/IN.1/I907 and 08/SRC/I1411
ID Code:27327
Deposited On:27 Jun 2022 10:03 by Miles Turner . Last Modified 20 Jul 2022 16:26
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