A computational study of pseudo-filamentary nanosecond pulsed dielectric barrier discharge in atmospheric air

The formation and propagation of pseudo-filamentary dielectric barrier discharge in atmospheric air are investigated through a 2D fluid model. development can be divided into three stages: the volume streamer stage, surface reverse stage. simulations show that head becomes wider electron density increases six times when interacts with dielectric, transforms after interaction. Compared streamers, streamers have smaller radius, higher electric field, density. Furthermore, parameters may influence characteristics also studied. It is found larger permittivity, thinner or shorter voltage rise time leads to earlier inception faster current observed velocity first, then, decreases accumulated charges on surface.