Numerical Simulation of Dielectric Barrier Discharges in Electrophotography
Practical understanding of electrical discharges between conductors or between conductors and dielectrics is instrumental for the development of novel charging devices for Digital Printing Applications. The work presented on this paper focuses on fundamental aspects related to the inception of electrical discharges and breakdown in the initial stages (few 100’s of μs) to a detail hard to match with experimental techniques. Numerical simulations of 1-D Townsend and Dielectric Barrier Discharges (DBDs) are performed using a commercial Finite Element package (COMSOL). A combined fluid model for the electron and Ion fluxes is used together with a local field approximation on a 1-D domain comprised of Nitrogen gas. The renowned Paschen breakdown result is successfully predicted numerically. Results are shown for the transient Townsend discharge that leads to this breakdown offering insight into the positive feedback mechanism that enables it. These transient results show how impact ionization combined with cathode secondary emission generate increasing waves of positive ions that drift towards the cathode again self feeding the discharge process. The simulation is then extended to predict the nature of a DBD in the case of a single voltage pulse.
Napoleon Leoni Bhooshan Paradkar
Hewlett Packard Laboratories, Palo Alto, CA. Department, UCSD, San Diego, CA
国际会议
The 31st International Congress on Imaging Science(第31届国际影像科学大会 ICIS2010)
北京
英文
90-93
2010-05-12（万方平台首次上网日期，不代表论文的发表时间）