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Numerical study of the anode boundary layer in atmospheric pressure arc discharges

Semenov, Igor and Krivtsun, Igor and Reisgen, Uwe (2016) Numerical study of the anode boundary layer in atmospheric pressure arc discharges. Journal of Physics D: Applied Physics, 49. Institute of Physics (IOP) Publishing. DOI: 10.1088/0022-3727/49/10/105204 ISSN 0022-3727

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Official URL: http://iopscience.iop.org/article/10.1088/0022-3727/49/10/105204/meta;jsessionid=71E1CF7EC4D23A688EC14F062E16FF22.c2.iopscience.cld.iop.org


The anode boundary layer in atmospheric pressure arc discharges is studied numerically on the basis of the hydrodynamic (diffusion) equations for plasma components. The governing equations are formulated in a unified manner without the assumptions of thermal equilibrium, ionization equilibrium or quasi-neutrality. For comparison, a quasi-neutral model of the anode layer is also considered. The numerical computations are performed for an argon arc at typical values of the current density in anode layers (500–2000 A cm−2). The results of numerical modelling show that the common collisionless model of the sheath fails to describe the sheath region for the problem under consideration. For this reason, a detailed analysis of the anode sheath is performed using the results of unified modelling. In addition, the distributions of plasma parameters in the anode layer are analysed and the basic characteristics of the layer (anode voltage drop, sheath voltage drop, anode layer thickness, sheath thickness, heat flux to the anode) are calculated. Our results are found to be in good agreement with the existing theoretical predictions and experimental data. The dependence of the anode layer characteristics on the current density is also discussed.

Item URL in elib:https://elib.dlr.de/104563/
Document Type:Article
Title:Numerical study of the anode boundary layer in atmospheric pressure arc discharges
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Semenov, IgorForschungsgruppe Komplexe Plasmen, DLR, OPhttps://orcid.org/0000-0001-6689-448X
Krivtsun, IgorE.O. Paton Electric Welding InstituteUNSPECIFIED
Reisgen, UweWelding and Joining Institute, RWTH Aachen UniversityUNSPECIFIED
Date:8 February 2016
Journal or Publication Title:Journal of Physics D: Applied Physics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1088/0022-3727/49/10/105204
Publisher:Institute of Physics (IOP) Publishing
Keywords:anode boundary layer, atmospheric pressure arc discharges, numerical modelling, hydrodynamic equations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Theory, Simulation
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma
Deposited By: Semenov, Igor (Admin.), Funktional
Deposited On:06 Jun 2016 16:23
Last Modified:08 Mar 2018 18:37

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