期刊
PLASMA SOURCES SCIENCE & TECHNOLOGY
卷 25, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0963-0252/25/1/015002
关键词
plasmas; dielectric barrier discharge; packing; modelling
资金
- Belgian Science Policy Office (BELSPO)
- Institute for the Promotion of Innovation by Science and Technology in Flanders (IWT Flanders)
A packed bed dielectric barrier discharge plasma reactor is computationally studied with a fluid model. Two different complementary axisymmetric 2D geometries are used to mimic the intrinsic 3D problem. It is found that a packing enhances the electric field strength and electron temperature at the contact points of the dielectric material due to polarization of the beads by the applied potential. As a result, these contact points prove to be of direct importance to initiate the plasma. At low applied potential, the discharge stays at the contact points, and shows the properties of a Townsend discharge. When a high enough potential is applied, the plasma will be able to travel through the gaps in between the beads from wall to wall, forming a kind of glow discharge. Therefore, the inclusion of a so-called 'channel of voids' is indispensable in any type of packed bed modelling.
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