Surface dielectric barrier discharge on locally bulged material

Abstract

The propagation of atmospheric pressure streamer on the locally bulged dielectric material is essential for plasma catalysis and functionalizing biomedical materials. Such functionalization improves the uniformity of the treatment on the barrier surface. The characteristics of the streamer propagating depend on the bulged surface conditions. In this work, a two-dimensional self-consistent fluid model was built to study surface dielectric barrier discharge (SDBD) with bulges on the surface of the dielectric barrier, including electron density distribution, surface charge density evolution, and other electric parameters. It is demonstrated that with the increase of bulges’ height, the streamer strides over the gaps between the bulges. Two branches of surface charge move along the surface of bulge from the left side of it. The existence of bulges with smaller curvature extend the propagation length of the streamer.