Kelvin-Helmholtz induced mixing in multi-fluid partially-ionised plasmas
dc.contributor.author | Snow, B | |
dc.contributor.author | Hillier, AS | |
dc.date.accessioned | 2024-04-25T08:22:50Z | |
dc.date.issued | 2024-04-25 | |
dc.date.updated | 2024-04-19T08:25:07Z | |
dc.description.abstract | Turbulence is a fundamental process that drives mixing and energy redistribution across a wide range of astrophysical systems. For warm (T ≈ 104 K) plasma, the material is partially ionized, consisting of both ionized and neutral species. The interactions between ionized and neutral species are thought to play a key role in heating (or cooling) of partially ionized plasmas. Here, mixing is studied in a two fluid partially ionized plasma undergoing the shear driven Kelvin–Helmholtz instability to evaluate the thermal processes within the mixing layer. Two dimensional numerical simulations are performed using the open-source (PIP) code that solves for a two fluid plasma consisting of a charge-neutral plasma and multiple excited states of neutral hydrogen. Both collisional and radiative ionization and recombination are included. In the mixing layer, a complex array of ionization and recombination processes occur as the cooler layer joins the hotter layer, and vice versa. In localized areas of the mixing layer, the temperature exceeds the initial temperatures of either layer with heating dominated by collisional recombinations over turbulent dissipation. The mixing layer is in approximate ionization-recombination equilibrium, however the obtained equilibrium is different to the Saha–Boltzmann local thermal equilibrium. The dynamic mixing processes may be important in determining the ionization states, and with that intensities of spectral lines, of observed mixing layers. This article is part of the theme issue ‘Partially ionized plasma of the solar atmosphere: recent advances and future pathways’ | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.identifier.citation | Vol. 382 (2272), article 20230227 | |
dc.identifier.doi | 10.1098/rsta.2023.0227 | |
dc.identifier.grantnumber | ST/V000659/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/135799 | |
dc.identifier | ORCID: 0000-0002-4500-9805 (Snow, Benjamin) | |
dc.language.iso | en | en_GB |
dc.publisher | The Royal Society | en_GB |
dc.rights | © 2024 The Authors. Open access. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. | en_GB |
dc.title | Kelvin-Helmholtz induced mixing in multi-fluid partially-ionised plasmas | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2024-04-25T08:22:50Z | |
dc.identifier.issn | 1471-2962 | |
dc.description | This is the final version. Available on open access from the Royal Society via the DOI in this record | en_GB |
dc.description | Data accessibility: This article has no additional data. | |
dc.identifier.journal | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2024-03-19 | |
dcterms.dateSubmitted | 2023-12-11 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2024-03-19 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2024-04-19T08:25:23Z | |
refterms.versionFCD | AM | |
refterms.dateFOA | 2024-05-10T14:13:04Z | |
refterms.panel | B | en_GB |
Files in this item
This item appears in the following Collection(s)
Except where otherwise noted, this item's licence is described as © 2024 The Authors. Open access. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.