Fluid modelling of a packed bed dielectric barrier discharge plasma reactorFluid modelling of a packed bed dielectric barrier discharge plasma reactor
Faculty of Sciences. Chemistry
Plasma, laser ablation and surface modeling - Antwerp (PLASMANT)
2016Bristol :Institute of Physics, 2016
Plasma sources science and technology / Institute of Physics. - Bristol, 1992, currens
25(2016):1, 11 p.
University of Antwerp
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.