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

Abstract

The results of time-dependent one-dimensional modelling of a dielectric barrier discharge (DBD) in a nitrogen-oxygenwater vapor mixture at atmospheric pressure are presented. The voltage-current characteristics curves and the production of active species are studied. The discharge is driven by a sinusoidal alternating high voltage-power supply at 30 kV with frequency of 27 kHz. The electrodes and the dielectric are assumed to be copper and quartz, respectively. The current discharge consists of an electrical breakdown that occurs in each half-period. A detailed description of the electron attachment and detachment processes, surface charge accumulation, charged species recombination, conversion of negative and positive ions, ion production and losses, excitations and dissociations of molecules are taken into account. Timedependent one-dimensional electron density, electric field, electric potential, electron temperature, densities of reactive oxygen species (ROS) and reactive nitrogen species (RNS) such as: O, O-, O ? , O À 2 , O þ 2 , O 3 , N; N þ 2 , N 2s and N À 2 are simulated versus time across the gas gap. The results of this work could be used in plasma-based pollutant degradation devices.

Simulation of the Impact of Humidity on the Species Generated by a One-Dimensional Discharge of Helium Gas

“…in the vicinity of the electrode surface. The numerical value obtained for the electron density for an atmospheric pressure plasma is in good agreement with previous simulation and experimental works [33,34]. In Figure 7, the evolution of the H2O + density is presented as a function of distance.…”

A numerical analysis of the impact of gas pressure and dielectric material on the generation of body force in an air gas plasma actuator

“…Reaction rates were taken from the references (Sakiyama et al, 2012). The dominant reactions can be seen in Tables 1 to 6, including electron impact Table 4: Atomic and molecule-to-molecule interactions with two and three bodies (Stafford and Kushner, 2004;Sohbatzadeh and Soltani, 2018).…”

“…The electron impact reactions with active nitrogen species, such as nitrogen molecules N 2 and N + 2 , that are singly ionized are shown in Table 1. The interactions of electron impact with active oxygen species, such (Sohbatzadeh and Soltani, 2018).…”

A Study on OLED Cell Simulation and Detection Phases Based on the A2G Algorithm for Artificial Intelligence Application

“…The generated samples represent the growth of dark spots with varying degradation times (t), number of pinholes (N), and sizes (r 0 ). The growth of dark spots can be represented by Equation (1), which relates the radius (D) and degradation time (t) [11].…”