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

2008Journal article Restricted access
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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 simplifications, 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 identified. It is shown that the near-cathode space-charge sheath is of primary importance under conditions of practical interest. Physical bases of simplified 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 simplified 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 Ciências 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.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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