English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The propagation mechanisms of plasma streamers have been observed andinvestigated in a surface dielectric barrier discharge (SDBD) using 2D particlein cell simulations. The investigations are carried out under a simulated airmixture, 80\% N$_2$ and 20\% O$_2$, at atmospheric pressure, 100$\,$kPa, underboth DC conditions and a pulsed DC waveform that represent AC conditions. Thesimulated geometry is a simplification of the symmetric and fully exposed SDBDresulting in the simultaneous ignition of both positive and negative streamerson either side of the Al$_2$O$_3$ dielectric barrier. In order to determine theinteractivity of the two streamers, the propagation behavior for the positiveand negative streamers are investigated both independently and simultaneouslyunder identical constant voltage conditions. An additional focus is imploredunder a fast sub nanosecond rise time square voltage pulse alternating betweenpositive and negative voltage conditions, thus providing insight into thedynamics of the streamers under alternating polarity switches. It is shown thatthe simultaneous ignition of both streamers, as well as using the pulsed DCconditions, provides both an enhanced discharge and an increased surfacecoverage. It is also shown that additional streamer branching may occur in across section that is difficult to experimentally observe. The enhanceddischarge and surface coverage may be beneficial to many applications such as,but are not limited to: air purification, volatile organic compound removal,and plasma enhanced catalysis.

Computational study of simultaneous positive and negative streamer propagation in a twin surface dielectric barrier discharge via 2D PIC simulations