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dc.contributor.authorSnow, B
dc.contributor.authorHillier, AS
dc.date.accessioned2024-04-25T08:22:50Z
dc.date.issued2024-04-25
dc.date.updated2024-04-19T08:25:07Z
dc.description.abstractTurbulence 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.sponsorshipScience and Technology Facilities Council (STFC)en_GB
dc.identifier.citationVol. 382 (2272), article 20230227
dc.identifier.doi10.1098/rsta.2023.0227
dc.identifier.grantnumberST/V000659/1en_GB
dc.identifier.urihttp://hdl.handle.net/10871/135799
dc.identifierORCID: 0000-0002-4500-9805 (Snow, Benjamin)
dc.language.isoenen_GB
dc.publisherThe Royal Societyen_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.titleKelvin-Helmholtz induced mixing in multi-fluid partially-ionised plasmasen_GB
dc.typeArticleen_GB
dc.date.available2024-04-25T08:22:50Z
dc.identifier.issn1471-2962
dc.descriptionThis is the final version. Available on open access from the Royal Society via the DOI in this recorden_GB
dc.descriptionData accessibility: This article has no additional data.
dc.identifier.journalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciencesen_GB
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_GB
dcterms.dateAccepted2024-03-19
dcterms.dateSubmitted2023-12-11
rioxxterms.versionVoRen_GB
rioxxterms.licenseref.startdate2024-03-19
rioxxterms.typeJournal Article/Reviewen_GB
refterms.dateFCD2024-04-19T08:25:23Z
refterms.versionFCDAM
refterms.dateFOA2024-05-10T14:13:04Z
refterms.panelBen_GB


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© 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.
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.