Alfvén ionization in an MHD-gas interactions code

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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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
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 (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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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
589401STFC Quota Studentships 2011Martin HendryScience & Technologies Facilities Council (STFC)ST/J501049/1S&E P&A - PHYSICS & ASTRONOMY