الفهرس | Only 14 pages are availabe for public view |
Abstract In this work, a one dimensional model of Dielectric Barrier Plasma Discharge (DBD) at atmospheric pressure (APP) with helium working gas. There has been a considerable interest in non-thermal atmospheric pressure discharges over the past decade due to increased number of industrial applications. Although non-thermal atmospheric pressure discharges have been intensively studied for the past century the clear physical picture of these discharges is far from being complete. Spontaneous transition of non-thermal atmospheric pressure discharges to thermal discharge and discharge filamentation are among least understood plasma phenomena. The discharge stability and reliable control of plasma parameters are highly desirable for numerous applications. This study focuses on stability of atmospheric pressure glow discharges with respect to filamentation and arcing. The model solves the continuity equations for charged species and the electron energy balance equation, coupled with Poisson’s equation, by the finite element method. DBD plasma simulation results are given in terms of temporal variations of plasma electric characteristics such gas voltage and discharge current. The discharge behavior is studied as a function of external parameters such as the width of the discharge space and the nature of the dielectric through the value of its dielectric constant. Finally, an interactive way for the development of an Internet laboratory is introduced. Development of a virtual model of the laboratory is reported. The difference between an Internet Lab and a Virtual Lab is |