Spatio-temporal Distributions of Accumulated Charge Density in Atmospheric Pressure Dielectric Barrier Discharges

Haruaki Akashi, Tomokazu Yoshinaga
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Abstract

Effect of secondary electron emission coefficient on accumulated charge density distributions in atmospheric pressure dielectric barrier discharges have been simulated using two dimensional fluid model. Spatio-temporal distributions of accumulated charge density on each side of dielectric have been examined. The differences of conventional waveforms of accumulated charge density and the simulated results were clarified. And when the dielectrics were negatively accumulated, charges were uniformly accumulated, while positive charges were not. Randomness of streamers occurrence, and self-organized structures have been also examined by the accumulated charge distributions.
常压介质阻挡放电中累积电荷密度的时空分布
利用二维流体模型模拟了二次电子发射系数对常压介质阻挡放电中累积电荷密度分布的影响。研究了介电介质两侧累积电荷密度的时空分布。澄清了累积电荷密度的常规波形与模拟结果的差异。当介质负积聚时,电荷均匀积聚,而正电荷则不均匀积聚。累积电荷分布也检验了飘带发生的随机性和自组织结构。
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