Directional mass transport in an atmospheric pressure surface barrier discharge.
Directional mass transport in an atmospheric pressure surface barrier discharge.
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DOI：
10.1038/s41598-017-14117-1
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发表时间：
2017-10-25
影响因子：
4.6
通讯作者：
Walsh JL
中科院分区：
文献类型：
--
作者：
Dickenson A;Morabit Y;Hasan MI;Walsh JL
在大气压表面阻挡放电中，等离子体产生区域与下游应用点之间固有的物理分离降低了到达样品的活性化学物质通量，这可能会限制应用效果。本文探讨了通过控制所施加电压的相位角来对等离子体产生的电流体动力学力进行一定程度控制的影响。由于这些力产生的对流是物质传输的主要机制，该技术有助于将活性物质定向输送到下游点，而不会损害基础的物质产生机制。粒子图像测速测量用于证明，在表面阻挡放电中，施加到相邻电极的正弦电压之间的相移会导致等离子体诱导气体流动方向发生显著偏差。利用二维空气等离子体数值模型表明，相移会影响相邻电极之间电介质表面上沉积电荷的空间分布。改变后的表面电荷分布会减小在滞后电极上点燃的放电的传播长度，导致产生的力不平衡，从而使产生的气体流动方向发生变化。
In an atmospheric pressure surface barrier discharge the inherent physical separation between the plasma generation region and downstream point of application reduces the flux of reactive chemical species reaching the sample, potentially limiting application efficacy. This contribution explores the impact of manipulating the phase angle of the applied voltage to exert a level of control over the electrohydrodynamic forces generated by the plasma. As these forces produce a convective flow which is the primary mechanism of species transport, the technique facilitates the targeted delivery of reactive species to a downstream point without compromising the underpinning species generation mechanisms. Particle Imaging Velocimetry measurements are used to demonstrate that a phase shift between sinusoidal voltages applied to adjacent electrodes in a surface barrier discharge results in a significant deviation in the direction of the plasma induced gas flow. Using a two-dimensional numerical air plasma model, it is shown that the phase shift impacts the spatial distribution of the deposited charge on the dielectric surface between the adjacent electrodes. The modified surface charge distribution reduces the propagation length of the discharge ignited on the lagging electrode, causing an imbalance in the generated forces and consequently a variation in the direction of the resulting gas flow.
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影响因子：
3.4
作者：
Sakiyama, Yukinori;Graves, David B.;Morfill, Gregor E.
通讯作者：
Morfill, Gregor E.
影响因子：
2.2
作者：
Cernak, M.;Kovacik, D.;Cernakova, L.
通讯作者：
Cernakova, L.
影响因子：
2.5
作者：
Enloe, C. L.;Font, G. I.;Orlov, D. M.
通讯作者：
Orlov, D. M.
影响因子：
3.3
作者：
Nosenko, T.;Shimizu, T.;Morfill, G. E.
通讯作者：
Morfill, G. E.
影响因子：
3.7
作者：
Ziuzina D;Boehm D;Patil S;Cullen PJ;Bourke P
通讯作者：
Bourke P