Unified fluid model analysis and benchmark study for electron transport in gas and liquid analogues

Garland, N.A., Cocks, D.G., Boyle, G.J., Dujko, S., and White, R.D. (2017) Unified fluid model analysis and benchmark study for electron transport in gas and liquid analogues. Plasma Sources Science and Technology, 26 (7). 075003. pp. 1-16.

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Abstract

The interaction of plasmas with liquids requires an understanding of charged particle transport in both the gaseous and liquid phases. In this study we present a generalized fluid-equation framework to describe bulk electron transport in both gaseous and non-polar liquid environments under non-hydrodynamic non-equilibrium conditions. The framework includes liquid structural effects through appropriate inclusion of coherent scattering effects and adaption of swarm data to account for the modification to the scattering environment present in such systems. In the limit of low-densities it reduces to the traditional gas-phase fluid-equation model. Using a higher-order fluid model (four moments), it is shown that by applying steady state electron swarm data in both the gaseous and liquid phases, to close the system of equations and evaluate collisional rates, an improvement in macroscopic electron transport results over popular existing assumptions used. The failure of the local mean energy approximation in fluid models to accurately describe complex spatial oscillatory structures in both the gaseous and liquid phases is discussed in terms of the spatial variation of the electron distribution function itself.

Item ID: 48951
Item Type: Article (Research - C1)
ISSN: 1361-6595
Keywords: fluid modeling; coherent scattering; gas and liquid discharges; low temperature plasma; fluid model closure; non-local transport
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A version of this publication was included as Chapter 2 of the following PhD thesis: Garland, Nathan Ashley (2018) Electron transport modeling in gas and liquid media for application in plasma medicine. PhD thesis, James Cook University, which is available Open Access in ResearchOnline@JCU. Please see the Related URLs for access.

Funders: Australian Government (AG), James Cook University (JCU), MPNTRRS
Projects and Grants: AG postgraduate award, JCU HDR Research Enhancement Scheme, MPNTRRS Project OI171037, MPNTRRS Project III41011
Date Deposited: 06 Jul 2017 02:48
FoR Codes: 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020299 Atomic, Molecular, Nuclear, Particle and Plasma Physics not elsewhere classified @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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