Ionization fronts in coupled MHD-gas simulations

Wilson, A.D. and Diver, D.A. (2017) Ionization fronts in coupled MHD-gas simulations. Physics of Plasmas, 24(9), 092112. (doi: 10.1063/1.5001083)

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Abstract

Partially ionized plasmas are ubiquitous in both nature and the laboratory, and their behaviour is best described by models which take into account the interactions between the neutral and charged species. We present a new non-linear, 3-dimensional, finite difference Gas-MHD Interactions Code designed to solve simultaneously the time evolution of fluid equations of both species in the conservation form as well as collisional interactions between them via appropriate choices of source term; in particular, we present results from this code in simulating Alfvén ionization in a partially ionized plasma. In this fashion, larger changes in the ionization fraction than were addressable in the linear limit are possible. Alfvén ionization is shown to impart plasmas with an inherent resistance to rapid recombination, where the recombination itself is significant enough to drive relative motion between the ionised and neutral species at speeds in excess of the critical velocity.

Item Type:Articles
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:07 September 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Physics of Plasmas 24(9):092112
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.409

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
589403STFC Quota Studentships 2011Martin HendryScience & Technology Facilities Council (STFC)ST/J501049/1S&E P&A - PHYSICS & ASTRONOMY
709721Evolution and dynamics of pellets and dust in dynamic gas-plasma systemsDeclan DiverEngineering and Physical Sciences Research Council (EPSRC)EP/N018117/1S&E P&A - PHYSICS & ASTRONOMY