Kinetic modeling of streamer penetration into de-ionized water

Type
Article

Authors
Levko, Dmitry
Sharma, Ashish
Raja, Laxminarayan L.

Online Publication Date
2018-03-23

Print Publication Date
2018-03

Date
2018-03-23

Abstract
Interest in plasma-liquid interaction phenomena has grown in recent years due to applications in plasma medicine, water purification, and plasma-hydrocarbon reforming. The plasma in contact with liquid is generated, for example, using the plasma jets or streamer discharges. The interaction between the streamer and water can cause both physical and chemical modifications of the liquid. In this paper, the interaction between an anode-directed streamer and the de-ionized water is studied using one-dimensional particle-in-cell Monte Carlo collisions model. In this model, plasma species in both gas and liquid phase are considered as the macro-particles. We find that the penetration of the streamer head into the liquid causes ionization of water molecules by electron impact, a process which is usually ignored in the fluid models. The main charge carriers in the liquid phase are negative water ions which agree with earlier experimental and computational modeling studies. Additionally, we observe an ion-rich sheath in the vicinity of the water surface on the gas side.

Citation
Levko D, Sharma A, Raja LL (2018) Kinetic modeling of streamer penetration into de-ionized water. Physics of Plasmas 25: 033515. Available: http://dx.doi.org/10.1063/1.5019961.

Acknowledgements
The research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). The authors also acknowledge Professor C. Champion for the provided database on the electron impact cross sections for the liquid water.

Publisher
AIP Publishing

Journal
Physics of Plasmas

DOI
10.1063/1.5019961

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