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Unified modelling of near-cathode plasma layers in high-pressure arc discharges

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dc.contributor.authorAlmeida, N. A.
dc.contributor.authorBenilov, M. S.
dc.contributor.authorNaidis, G. V.
dc.date.accessioned2019-11-11T12:05:50Z
dc.date.available2019-11-11T12:05:50Z
dc.date.issued2008
dc.description.abstractA model of a near-cathode region in high-pressure arc discharges is developed in the framework of the hydrodynamic (diffusion) approximation. Governing equations are solved numerically in 1D without any further simpliļ¬cations, in particular, without explicitly dividing the near-cathode region into a space-charge sheath and a quasi-neutral plasma. Results of numerical simulation are reported for a very high-pressure mercury arc and an atmospheric-pressure argon arc. Physical mechanisms dominating different sections of the near-cathode region are identiļ¬ed. It is shown that the near-cathode space-charge sheath is of primary importance under conditions of practical interest. Physical bases of simpliļ¬ed models of the near-cathode region in high-pressure arc discharges are analysed. A comparison of results given by the present model with those given by a simpliļ¬ed model has revealed qualitative agreement; the agreement is not only qualitative but also quantitative in the case of an atmospheric-pressure argon plasma at moderate values of the near-cathode voltage drop. The modelling data are compared with results of spectroscopic measurements of the electron temperature and density in the near-cathode region.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationAlmeida, N. A., Benilov, M. S., & Naidis, G. V. (2008). Unified modelling of near-cathode plasma layers in high-pressure arc discharges. Journal of Physics D: Applied Physics, 41(24), 245201.pt_PT
dc.identifier.doi10.1088/0022-3727/41/24/245201pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/2594
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherIOP Publishingpt_PT
dc.relationModes of current transfer to cathodes of high-pressure arc discharges and their stability
dc.subjectModel of a near-cathode region in high-pressure arc dischargespt_PT
dc.subjectHigh-pressure arc dischargespt_PT
dc.subject.pt_PT
dc.subjectFaculdade de CiĆŖncias Exatas e da Engenhariapt_PT
dc.titleUnified modelling of near-cathode plasma layers in high-pressure arc dischargespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleModes of current transfer to cathodes of high-pressure arc discharges and their stability
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FFIS%2F60526%2F2004/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PPCDT%2FFIS%2F60526%2F2004/PT
oaire.citation.startPage245201pt_PT
oaire.citation.titleJournal of Physics D: Applied Physicspt_PT
oaire.citation.volume41(24)pt_PT
oaire.fundingStreamPOCI
oaire.fundingStream3599-PPCDT
person.familyNameAlmeida
person.familyNameBenilov
person.familyNameNaidis
person.givenNameNelson
person.givenNameMikhail
person.givenNameGeorge
person.identifier.ciencia-id0516-6FAA-27E2
person.identifier.ciencia-id0F14-A79A-97C1
person.identifier.orcid0000-0002-6499-3609
person.identifier.orcid0000-0001-9059-1948
person.identifier.orcid0000-0003-2184-802X
person.identifier.ridM-6228-2013
person.identifier.ridK-4443-2015
person.identifier.scopus-author-id7003469070
person.identifier.scopus-author-id7005138676
person.identifier.scopus-author-id6701765912
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
project.funder.nameFundaĆ§Ć£o para a CiĆŖncia e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication5ccf95a3-53d5-446c-857c-55d64b887175
relation.isAuthorOfPublication8605b032-ade3-4d43-b569-9b74b1c532ab
relation.isAuthorOfPublication.latestForDiscovery8605b032-ade3-4d43-b569-9b74b1c532ab
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