Fluid modelling of a packed bed dielectric barrier discharge plasma reactor
- 1 December 2015
- journal article
- Published by IOP Publishing in Plasma Sources Science and Technology
- Vol. 25 (1), 015002
- https://doi.org/10.1088/0963-0252/25/1/015002
Abstract
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.Keywords
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