Fundamental issues in fluid modeling: Direct substitution and aliasing methods

被引：9

作者：

Robson, R. E. ^{[1
]}

Nicoletopoulos, P. ^{[2
]}

Hildebrandt, M. ^{[3
]}

White, R. D. ^{[1
]}

机构：

[1] James Cook Univ, Ctr Antimatter Matter Studies, Townsville, Qld 4811, Australia

[2] Univ Libre Brussels, Fac Sci, B-1050 Brussels, Belgium

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF CHEMICAL PHYSICS | 2012年 / 137卷 / 21期

基金：

澳大利亚研究理事会;

关键词：

CHARGED-PARTICLE TRANSPORT; MOMENTUM-TRANSFER THEORY; WIDE ENERGY-RANGE; CROSS-SECTIONS; ELECTRON-TRANSPORT; GLOW-DISCHARGES; GASEOUS-IONS; SWARM PARAMETERS; COEFFICIENTS; MOBILITY;

D O I：

10.1063/1.4768421

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4768421]

引用

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