Interaction of positive streamers in air with bubbles floating on liquid surfaces: conductive and dielectric bubbles
Interaction of positive streamers in air with bubbles floating on liquid surfaces: conductive and dielectric bubbles
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DOI：
10.1088/1361-6595/aaa5da
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发表时间：
2018-01
影响因子：
3.8
通讯作者：
N. Babaeva;G. Naidis;M. Kushner
中科院分区：
文献类型：
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作者：
N. Babaeva;G. Naidis;M. Kushner
等离子体在潮湿空气中与液体的相互作用在气相和液体中产生反应物质，应用范围从医学到农业。在一些实验中，当液体是泡沫或包有气泡的液体时，液体反应性增强。为了研究流光与气泡相互作用的现象，本文采用二维计算方法研究了流光在浮于液体表面的半球形气泡壳上及其内部的产生和传播。在之前的实验基础上，研究了在气泡内外分别设置电极的水和油泡壳。我们发现，正流带与导电水和介电油气泡的相互作用是不同的。由于导电壳对电场的屏蔽，该流光沿着水泡的外表面传播，而不穿透该泡。如果电极插入气泡内，流光的路径取决于电极穿透的深度。对于浅穿透，流光沿着气泡的内表面传播。由于油泡壳的低导电性，来自外部电极的电场会渗透到油泡内部。然后可以在气泡内重新启动拖缆。
The interaction of plasmas sustained in humid air with liquids produces reactive species in both the gas phase and liquid for applications ranging from medicine to agriculture. In several experiments, enhanced liquid reactivity has been produced when the liquid is a foam or a bubble coated liquid. To investigate the phenomena of streamers interacting with bubbles a two-dimensional computational investigation has been performed of streamer initiation and propagation on and inside hemispherical bubble-shells floating on a liquid surface. Following prior experiments, water and oil bubble-shells with an electrode located outside and inside the bubble were investigated. We found that positive air streamers interact differently with conductive water and dielectric oil bubbles. The streamer propagates along the external surface of a water bubble while not penetrating through the bubble due to screening of the electric field by the conducting shell. If the electrode is inserted inside the bubble, the path of the streamer depends on how deeply the electrode penetrates. For shallow penetration, the streamer propagates along the inner surface of the bubble. Due to the low conductivity of oil bubble-shells, the electric field from an external electrode penetrates into the interior of the bubble. The streamer can then be re-initiated inside the bubble.