A computational model is used to investigate the characteristics of atmospheric radio frequency discharges by increasing frequency from 20 to 100 MHz at a constant power density. The simulation results show that increasing frequency can effectively enhance electron density before the transition frequency but after it the ignition is quenched then the electron density decreases. However this simulation also indicates the maximum time-averaged electron energy reduces monotonically with the excitation frequency increasing at a constant power density.
In this paper, the splitting and uniting of the current-carrying zones in a dielectric barrier discharge are investigated at atmospheric pressure, and the motion of such zone is also referred while the discharge is developing. These phenomena are examined by the two-dimensional computational simulation with uniform initial conditions. The generation and annihilation of such zones are discussed according to the simulation results. The charges accumulated on the barrier surface are shown to play a dominant role in the global spatial-temporal evolution of filamentary discharge.
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