Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.13/4564 |
Resumo: | A widely used approach to simulation of high-pressure arc discharges is based on the system of magneto-hydrodynamic equations written in the approximation of local thermodynamic equilibrium (LTE). In this work, boundary conditions on the surface of the electrodes are formulated with the use of equations of balance of energy in the non-equilibrium near electrode layers that separate the LTE bulk plasma and the electrodes. As an example, numerical simulations of a free-burning arc in atmospheric-pressure argon plasma in the current range from 20 to 200 A are reported. Simulation results are in reasonably good agreement with those given by more sophisticated models and with the experiment. Simulations performed for cathodes of slightly different geometries have predicted a strong effect produced by details of the cathode geometry over the distribution of the current density along the cathode surface and therefore over the plasma temperature, an interesting and potentially important result that is worth further numerical investigation and experimental verification. |
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Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodesHigh-pressure arcsArc-electrodes interactionLTE arc core descriptionMatching conditions with electrodes.Faculdade de Ciências Exatas e da EngenhariaA widely used approach to simulation of high-pressure arc discharges is based on the system of magneto-hydrodynamic equations written in the approximation of local thermodynamic equilibrium (LTE). In this work, boundary conditions on the surface of the electrodes are formulated with the use of equations of balance of energy in the non-equilibrium near electrode layers that separate the LTE bulk plasma and the electrodes. As an example, numerical simulations of a free-burning arc in atmospheric-pressure argon plasma in the current range from 20 to 200 A are reported. Simulation results are in reasonably good agreement with those given by more sophisticated models and with the experiment. Simulations performed for cathodes of slightly different geometries have predicted a strong effect produced by details of the cathode geometry over the distribution of the current density along the cathode surface and therefore over the plasma temperature, an interesting and potentially important result that is worth further numerical investigation and experimental verification.IOP PublishingDigitUMaLisnyak, M.Cunha, M. D.Bauchire, J-MBenilov, M. S.2022-09-05T14:34:35Z2017-01-01T00:00:00Z2017-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/4564engLisnyak, M., Cunha, M. D., Bauchire, J. M., & Benilov, M. S. (2017). Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes. Journal of Physics D: Applied Physics, 50(31), 315203. https://doi.org/10.1088/1361-6463/aa76d310.1088/1361-6463/aa76d3info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-11T03:30:30Zoai:digituma.uma.pt:10400.13/4564Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:48:40.250428Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
title |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
spellingShingle |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes Lisnyak, M. High-pressure arcs Arc-electrodes interaction LTE arc core description Matching conditions with electrodes . Faculdade de Ciências Exatas e da Engenharia |
title_short |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
title_full |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
title_fullStr |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
title_full_unstemmed |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
title_sort |
Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes |
author |
Lisnyak, M. |
author_facet |
Lisnyak, M. Cunha, M. D. Bauchire, J-M Benilov, M. S. |
author_role |
author |
author2 |
Cunha, M. D. Bauchire, J-M Benilov, M. S. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
DigitUMa |
dc.contributor.author.fl_str_mv |
Lisnyak, M. Cunha, M. D. Bauchire, J-M Benilov, M. S. |
dc.subject.por.fl_str_mv |
High-pressure arcs Arc-electrodes interaction LTE arc core description Matching conditions with electrodes . Faculdade de Ciências Exatas e da Engenharia |
topic |
High-pressure arcs Arc-electrodes interaction LTE arc core description Matching conditions with electrodes . Faculdade de Ciências Exatas e da Engenharia |
description |
A widely used approach to simulation of high-pressure arc discharges is based on the system of magneto-hydrodynamic equations written in the approximation of local thermodynamic equilibrium (LTE). In this work, boundary conditions on the surface of the electrodes are formulated with the use of equations of balance of energy in the non-equilibrium near electrode layers that separate the LTE bulk plasma and the electrodes. As an example, numerical simulations of a free-burning arc in atmospheric-pressure argon plasma in the current range from 20 to 200 A are reported. Simulation results are in reasonably good agreement with those given by more sophisticated models and with the experiment. Simulations performed for cathodes of slightly different geometries have predicted a strong effect produced by details of the cathode geometry over the distribution of the current density along the cathode surface and therefore over the plasma temperature, an interesting and potentially important result that is worth further numerical investigation and experimental verification. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01T00:00:00Z 2017-01-01T00:00:00Z 2022-09-05T14:34:35Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.13/4564 |
url |
http://hdl.handle.net/10400.13/4564 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Lisnyak, M., Cunha, M. D., Bauchire, J. M., & Benilov, M. S. (2017). Numerical modelling of high-pressure arc discharges: matching the LTE arc core with the electrodes. Journal of Physics D: Applied Physics, 50(31), 315203. https://doi.org/10.1088/1361-6463/aa76d3 10.1088/1361-6463/aa76d3 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799130352924491776 |