Speaker
Mohammad I. Hasan
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/I4.310.pdf
From streamers to long lived species: dynamics of a surface barrier
discharge
M. I. Hasan1, A. Dickenson1, A. Nikiforov2, C. Leys2, N. Britun3, J. L. Wlash1
1
Centre for Plasma Microbiology, Department of Electrical Engineering and Electronics,
the University of Liverpool L69 3GJ, Liverpool, United Kingdom.
2
Department of Applied Physics, Ghent University, Sint-Pietersnieuwstraat 41, Gent 9000,
Belgium.
3
Chimie des Interactions Plasma-Surface (ChIPS), CIRMAP, Université de Mons, 23 Place
du Parc, B-7000 Mons, Belgium.
In recent years, applications based on Surface Barrier Discharges (SBDs) have increased
significantly. SBDs in such applications serve as a simple and low cost source of reactive
chemical species under ambient conditions (atmospheric pressure and room temperature).
Examples of applications where this type of discharges is being used include CO2
conversion, pollution abatement in water, and microbial decontamination [1]. Critically, in
the SBD configuration, reactive species are not only generated, but transported beyond the
discharge region through an induced flow of the background gas caused by
Electrohydrodynamic (EHD) forces generated by the plasma [2]. For any given application it
is necessary to understand the spatial distribution of the generated reactive species, which is a
challenging task as the chemistry of the discharge is influenced by its induced flow [2]. In
this work, a 2D multiscale experimentally-validated numerical model is used to identify the
distribution of reactive species in space and time. The physics described by the model is
verified through comparison with flow pattern measured using Particle Image Velocimetry
(PIV). While the chemistry described in the model is verified by comparison of calculated
densities of species to measured densities using Laser Induced Fluoresce (LIF) and Fourier
Transform Infrared spectroscopy (FTIR). The comparison shows close agreement over a
range of conditions and that the distribution of NO produced by the discharge is confined to
the induced flow region above SBD. While this is not the case for several other species.
References
[1] M. Modic N. P. McLeod, J. M. Sutton, J. L. Walsh International Journal of
Antimicrobial Agents 49 375– 378 (2017)
[2] A. Dickenson, Y. Morabit, M. I. Hasan and J. L. Walsh Sci. Rep. 7, 14003 (2017)
[3] M. I. Hasan and J. L. Walsh Appl. Phys. Lett 110, 134102 (2017).
