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Novel non-equilibrium modelling of a DC electric arc in argon

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dc.contributor.authorBaeva, M.
dc.contributor.authorBenilov, M. S.
dc.contributor.authorAlmeida, N. A.
dc.contributor.authorUhrlandt, D.
dc.date.accessioned2019-11-12T10:06:01Z
dc.date.available2019-11-12T10:06:01Z
dc.date.issued2016
dc.description.abstractA novel non-equilibrium model has been developed to describe the interplay of heat and mass transfer and electric and magnetic fields in a DC electric arc. A complete diffusion treatment of particle fluxes, a generalized form of Ohm’s law, and numerical matching of the arc plasma with the space-charge sheaths adjacent to the electrodes are applied to analyze in detail the plasma parameters and the phenomena occurring in the plasma column and the near-electrode regions of a DC arc generated in atmospheric pressure argon for current levels from 20 A up to 200 A. Results comprising electric field and potential, current density, heating of the electrodes, and effects of thermal and chemical non-equilibrium are presented and discussed. The current–voltage characteristic obtained is in fair agreement with known experimental data. It indicates a minimum for arc current of about 80 A. For all current levels, a field reversal in front of the anode accompanied by a voltage drop of (0.7–2.6) V is observed. Another field reversal is observed near the cathode for arc currents below 80 A.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBaeva, M., Benilov, M. S., Almeida, N. A., & Uhrlandt, D. (2016). Novel non-equilibrium modelling of a DC electric arc in argon. Journal of Physics D: Applied Physics, 49(24), 245205.pt_PT
dc.identifier.doi10.1088/0022-3727/49/24/245205pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/2598
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relationPest-OE/UID/FIS/50010/2013pt_PT
dc.relationModelling, understanding, and controlling self-organization phenomena in plasma-electrode interaction in gas discharges: from first principles to applications
dc.subjectNon-equilibrium modellingpt_PT
dc.subjectDC arcpt_PT
dc.subjectSpecies diffusionpt_PT
dc.subjectGeneralized Ohm’s lawpt_PT
dc.subjectNon-equilibrium boundary layerpt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências Exatas e da Engenhariapt_PT
dc.titleNovel non-equilibrium modelling of a DC electric arc in argonpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleModelling, understanding, and controlling self-organization phenomena in plasma-electrode interaction in gas discharges: from first principles to applications
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS-PLA%2F2708%2F2012/PT
oaire.citation.startPage245205pt_PT
oaire.citation.titleJournal of Physics D: Applied Physicspt_PT
oaire.citation.volume49(24)pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameBenilov
person.familyNameAlmeida
person.givenNameMikhail
person.givenNameNelson
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.ciencia-id0516-6FAA-27E2
person.identifier.orcid0000-0001-9059-1948
person.identifier.orcid0000-0002-6499-3609
person.identifier.ridK-4443-2015
person.identifier.ridM-6228-2013
person.identifier.scopus-author-id7005138676
person.identifier.scopus-author-id7003469070
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication9a82798a-90e3-41c4-a9dd-7974813221a8
relation.isAuthorOfPublication.latestForDiscovery9a82798a-90e3-41c4-a9dd-7974813221a8
relation.isProjectOfPublicationac2557f2-e637-477a-8a14-7b1f23978256
relation.isProjectOfPublication.latestForDiscoveryac2557f2-e637-477a-8a14-7b1f23978256

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