Fluid modelling of a packed bed dielectric barrier discharge plasma reactor

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 c...

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Bibliographic Details
Published in:Plasma sources science & technology 2016-02, Vol.25 (1), p.15002-11
Main Authors: Van Laer, Koen, Bogaerts, Annemie
Format: Article
Language:English
Subjects:
Beads
Contact
dielectric barrier discharge
Electric contacts
Fluid flow
Fluids
Modelling
packing
plasmas
Reactors
Walls
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Summary: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.
ISSN:0963-0252
1361-6595
DOI:10.1088/0963-0252/25/1/015002