Three-Dimensional Modeling of Self-Organization in DC Glow Microdischarges

Almeida, Pedro; Benilov, M. S.; Faria, M J

doi:10.1109/tps.2011.2148129

Cited by 29 publications

(37 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The success of computational research has been markedly different between high-pressure arc and other types of discharges. In low-pressure -low-current discharges, driftdiffusion models have proven successful to describe the incidence of pattern formation in DBD and streamer discharges [7], and even the self-organization of one-, two-, and three-dimensional patterns in glow discharges [33,34]. In addition, time-dependent two-dimensional (axisymmetric) drift-diffusion nonequilibrium models have been able to capture the spontaneous occurrence of anode spots in high-pressure glow discharges [20].…”

mentioning

confidence: 99%

Formation of self-organized anode patterns in arc discharge simulations

Trelles

2013

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

Pattern formation and self-organization are phenomena commonly observed experimentally in diverse types of plasma systems, including atmospheric-pressure electric arc discharges.However, numerical simulations reproducing anode pattern formation in arc discharges have proven exceedingly elusive. Time-dependent three-dimensional thermodynamic nonequilibrium simulations reveal the spontaneous formation of self-organized patterns of anode attachment spots in the free-burning arc, a canonical thermal plasma flow established by a constant DC current between an axi-symmetric electrodes configuration in the absence of external forcing. The number of spots, their size, and distribution within the pattern depend on the applied total current and on the resolution of the spatial discretization, whereas the main properties of the plasma flow, such as maximum temperatures, velocity, and voltage drop, depend only on the former. The sensibility of the solution to the spatial discretization stresses the computational requirements for comprehensive arc discharge simulations. The obtained anode patterns qualitatively agree with experimental observations and confirm that the spots originate at the fringes of the arc -anode attachment. The results imply that heavy-species -electron energy equilibration, in addition to thermal instability, has a dominant role in the formation of anode spots in arc discharges.

show abstract

mentioning

confidence: 99%

Formation of self-organized anode patterns in arc discharge simulations

Trelles

2013

Plasma Sources Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…A range of experimental reports have since been published [1][2][3][4][5][6][7][8][9][10]. Modelling of the phenomenon [9,[11][12][13][14][15] has revealed, in agreement with the general theory of cathode spots and patterns in arc and DC glow discharges [16], the existence of multiple steady-state solutions for a given value of discharge current, which comprise modes of current transfer associated with different cathode spot patterns. Predictions concerning the existence of self-organizaed patterns in gases other than xenon, generated from the modelling, have been confirmed experimentally [9].…”

Section: Introductionmentioning

confidence: 68%

“…However, the modelling has been performed up to date for discharges with parallel-plane electrodes only [9,[11][12][13][14][15]. The question of how the shape of the anode affects the pattern of self-organization has so far not been addressed.…”

Section: Introductionmentioning

confidence: 99%

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

Bieniek¹,

Almeida²,

Benilov³

2016

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Self-organized patterns of cathode spots in glow discharges are computed in the cathode boundary layer geometry, which is the one employed in most of the experiments reported in the literature. The model comprises conservation and transport equations of electrons and a single ion species, written in the drift-diffusion and local-field approximations, and Poisson's equation. Multiple solutions existing for the same value of the discharge current and describing modes with different configurations of cathode spots are computed by means of a stationary solver. The computed solutions are compared to their counterparts for plane-parallel electrodes, and experiments. All of the computed spot patterns have been observed in the experiment.

show abstract

“…The variety of cathode spot patterns obtained by glow discharge under the same macroscopic conditions (gap geometry, pressure, glow current, gas flow rate and inter-electrode spacing) are a surprising result of this work. Cathode spot patterns are shown here as relevant to the development and assessment of state of the art numerical models on cathode spot patterns formed in dc glow discharges in gases, like the ones by Almeida et al [21][22][23]. Their model admits multiple multidimensional steady state solutions which are associated with different modes of current transfer to the cathode.…”

Section: Cathode Spot Pattern and Current Densitymentioning

confidence: 96%

Influence of the inter-electrode distance on the production of nanoparticles by means of atmospheric pressure inert gas dc glow discharge

Hontañón

Palomares

Guo

et al. 2014

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Hontanõn, E.; Palomares Linares, J.M.; Guo, C.; Engeln, R.A.H.; Nirschi, H.; Kruis, F. Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):Hontanõn, E., Palomares Linares, J. M., Guo, C., Engeln, R. A. H., Nirschi, H., & Kruis, F. (2014). Influence of the interelectrode distance on the production of nanoparticles by means of atmospheric pressure inert gas DC glow discharge. Journal of Physics D: Applied Physics, 47, 415201-1/12. DOI: 10.1088/0022-3727/47/41/415201 General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. AbstractThis work is aimed at investigating the influence of the inter-electrode spacing on the production rate and size of nanoparticles generated by evaporating a cathode on an atmospheric pressure dc glow discharge. Experiments are conducted in the configuration of two vertically aligned cylindrical electrodes in upward coaxial flow with copper as a consumable cathode and nitrogen as a carrier gas. A constant current of 0.5 A is delivered to the electrodes and the inter-electrode distance spanned from 0.5 to 10 mm. Continuous stable nanoparticle production is attained by optimal coaxial flow convection cooling of the cathode. Both the particle production rate and the primary particle size increase with the inter-electrode spacing up to nearly 5 mm and strongly decrease with an increasing inter-electrode distance beyond 5 mm. Production rates in the range of 1 mg h −1 of very small nanoparticles (<10 nm) are attained by a micro glow discharge (<1 mm); while glow discharges of intermediate sizes (<5 mm) result in production rates ...

show abstract

Three-Dimensional Modeling of Self-Organization in DC Glow Microdischarges

Cited by 29 publications

References 6 publications

Formation of self-organized anode patterns in arc discharge simulations

Formation of self-organized anode patterns in arc discharge simulations

Modelling cathode spots in glow discharges in the cathode boundary layer geometry

Influence of the inter-electrode distance on the production of nanoparticles by means of atmospheric pressure inert gas dc glow discharge

Contact Info

Product

Resources

About