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 inPlasma sources science & technology Vol. 25; no. 1; pp. 15002 - 11
Main Authors Van Laer, Koen, Bogaerts, Annemie
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.02.2016
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.
Bibliography:PSST-100756.R1
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ISSN:0963-0252
1361-6595
DOI:10.1088/0963-0252/25/1/015002