Fluid model for a partially packed dielectric barrier discharge plasma reactor

Abstract

In this work, a two-dimensional numerical \ud fluid model is developed for a partially\ud packed dielectric barrier discharge (DBD) in pure helium. In\ud fluence of packing on\ud the discharge characteristics is studied by comparing the results of DBD with partial\ud packing with those obtained for DBD with no packing. In the axial partial packing\ud configuration studied in this work, the electric field strength was shown to be en\ud hanced at the top surface of the spherical packing material and at the contact points\ud between the packing and the dielectric layer. For each value of applied potential,\ud DBD with partial packing showed an increase in the number of pulses in the current\ud profile in the positive half cycle of the applied voltage, as compared to DBD with\ud no packing. Addition of partial packing to the plasma-alone DBD also led to an\ud increase in the electron and ion number densities at the moment of breakdown. The\ud time averaged electron energy profiles showed that a much higher range of electron\ud energy can be achieved with the use of partial packing as compared to no packing\ud in a DBD, at the same applied power. The spatially and time averaged values over\ud one voltage cycle also showed an increase in power density and electron energy on\ud inclusion of partial packing in the DBD. For the applied voltage parameters studied\ud in this work, the discharge was found to be consistently homogeneous and showed\ud the characteristics of atmospheric pressure glow discharge

The Effects of Pulse Shape on the Selectivity and Production Rate in Non-oxidative Coupling of Methane by a Micro-DBD Reactor

“…However, with bearing in mind the periodicity of system, a 2D axisymmetric fluid modelling of a periodic unit will also be able to mimic the actual problem. This approach has widely been used in literature in simulation studies related to DBD devices used in gas conversion applications [36,37]. The fluid approach used here is based on solving a set of coupled differential equations that express the conservation of mass, momentum, and energy, for the different plasma species.…”

Time-dependent one-dimensional simulation of atmospheric dielectric barrier discharge in N2/O2/H2O using COMSOL Multiphysics

“…Many works have been devoted to simulation of the atmospheric pressure plasmas. For example, Gadkari et al modeled a co-axial DBD plasma reactor in pure helium using a 2-D fluid model in COMSOL Multiphysics [7]. They investigated the influence of partial packing on the discharge characteristics of the dielectric barrier discharge in helium.…”

Nanosecond Pulsed Discharge Dynamics During Passage of a Transient Laminar Flame

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