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dc.contributor.authorHeld, Markus
dc.contributor.authorWiesenberger, Matthias
dc.date.accessioned2024-04-10T07:54:54Z
dc.date.available2024-04-10T07:54:54Z
dc.date.issued2022-12-22
dc.description.abstractWe present the first simulations of a reduced magnetized plasma model that incorporates both arbitrary wavelength polarization and non-Oberbeck–Boussinesq effects. Significant influence of these two effects on the density, electric potential and <i><b>E</i></b> × <i><b>B</i></b> vorticity and non-linear dynamics of interchange blobs are reported. Arbitrary wavelength polarization implicates so-called gyro-amplification that compared to a long wavelength approximation leads to highly amplified small-scale <i><b>E</i></b> × <i><b>B</i></b> vorticity fluctuations. These strongly increase the coherence and< lifetime of blobs and alter the motion of the blobs through a slower blob-disintegration. Non-Oberbeck–Boussinesq effects incorporate plasma inertia, which substantially decreases the growth rate and linear acceleration of high amplitude blobs, while the maximum blob velocity is not affected. Finally, we generalize and numerically verify unified scaling laws for blob velocity, acceleration and growth rate that include both ion temperature and arbitrary blob amplitude dependence.en_US
dc.identifier.citationHeld, Wiesenberger. Beyond the Oberbeck-Boussinesq and long wavelength approximation. Nuclear Fusion. 2023;63(2)en_US
dc.identifier.cristinIDFRIDAID 2103181
dc.identifier.doi10.1088/1741-4326/aca9e0
dc.identifier.issn0029-5515
dc.identifier.issn1741-4326
dc.identifier.urihttps://hdl.handle.net/10037/33357
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.relation.journalNuclear Fusion
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© EURATOM 2022en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleBeyond the Oberbeck-Boussinesq and long wavelength approximationen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)