Format

Send to

Choose Destination
See comment in PubMed Commons below
J Chem Phys. 2012 Dec 7;137(21):214112. doi: 10.1063/1.4768421.

Fundamental issues in fluid modeling: direct substitution and aliasing methods.

Author information

1
Centre for Antimatter-Matter Studies, James Cook University, Townsville 4811, Australia.

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.

PMID:
23231222
DOI:
10.1063/1.4768421
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Institute of Physics
    Loading ...
    Support Center