Wilson, A.D. and Diver, D.A. (2016) Alfvén ionization in an MHD-gas interactions code. Physics of Plasmas, 23(7), 072117. (doi: 10.1063/1.4956443)
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Abstract
A numerical model of partially ionized plasmas is developed in order to capture their evolving ionization fractions as a result of Alfv´en ionization (AI). The mechanism of, and the parameter regime necessary for, AI is discussed and an expression for the AI rate based on fluid parameters, from a gas-MHD model, is derived. This AI term is added to an existing MHD-gas interactions code and the result is a linear, 2-d, two-fluid model that includes momentum transfer between charged and neutral species as well as an ionization rate that depends on the velocity fields of both fluids. The dynamics of waves propagating through such a partially ionized plasma are investigated and it is found that AI has a significant influence on the fluid dynamics as well as both the local and global ionization fraction.
| Item Type: | Articles |
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| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Diver, Professor Declan and Wilson, Dr Alasdair |
| Authors: | Wilson, A.D., and Diver, D.A. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physics of Plasmas |
| Publisher: | American Institute of Physics |
| ISSN: | 1070-664X |
| ISSN (Online): | 1089-7674 |
| Published Online: | 18 July 2016 |
| Copyright Holders: | Copyright © 2016 The Authors |
| First Published: | First published in Physics of Plasmas 23(7): 072117 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Data DOI: | 10.5525/gla.researchdata.329 |
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