Fundamental issues in fluid modeling: direct substitution and aliasing methods

Robson, R.E., Nicoletopoulos, P., Hildebrandt, M., and White, R.D. (2012) Fundamental issues in fluid modeling: direct substitution and aliasing methods. Journal of Chemical Physics, 137 (21). 214112. pp. 1-9.

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Abstract

It is shown how the accuracy of fluid models of charged particles in gases can be improved significantly by direct substitution of swarm transport coefficient data, rather than cross sections, into the average collision terms. This direct substitution method emerges in a natural way for fluid formulations in which the role of the mean energy is transparent, whatever the mass of the charged particles in equation (ions or electrons), and requires no further approximations. The procedure is illustrated by numerical examples for electrons, including the operational window of E/N for an idealized Franck-Hertz experiment. Using the same fluid formulation, we develop an aliasing method to estimate otherwise unknown mobility data for one type of particle, from known mobility data for another type of particle. The method is illustrated for muons in hydrogen, using tabulated data for protons in the same gas.

Item ID: 25075
Item Type: Article (Research - C1)
ISSN: 1089-7690
Funders: Australian Research Council (ARC), Free University of Brussels, Paul Scherrer Institute
Date Deposited: 20 Feb 2013 09:30
FoR Codes: 02 PHYSICAL SCIENCES > 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics > 020204 Plasma Physics; Fusion Plasmas; Electrical Discharges @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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