Analysis of streamers in pulsed corona and dielectric barrier discharges

Summary form only given, as follows. Numerical analysis of the streamer in PCD and DBD are carried out for a deeper insight into the plasma induced chemical reactions. Streamer analysis in PCD. We have developed a 3-D numerical simulation model to predict more reliable streamer propagation in a wire-cylinder reactor. As a result, inherent 3-D nature of the streamer propagation is successfully obtained. In addition, interaction phenomena between the neighboring streamers are more deeply investigated with this novel 3-D approach. Streamer analysis in DBD. It is experimentally well known that streamers take place during the rising phase of AC voltage and they show recurrent phenomena as well. Until now, however, numerical verifications have not been found yet, so, a new approach was carried out with considering the surface charge behavior on the barrier materials. The present simulation result, apparently shows the conduction loss of the surface charges is a key factor in recurrence phenomena in DBD. It is also found that a fast voltage rise produces electrons with high energies, while a slow voltage fall sustains the streamers for a longer period.