A global model of cylindrical and coaxial surface-wave discharges

Ke­man­eci, Efe; Mitschker, Felix; Rudolph, Marcel; Szeremley, Daniel; Eremin, Denis; Awakowicz, Peter; Brinkmann, Ralf Peter

doi:10.1088/1361-6463/aa7093

Cited by 14 publications

(27 citation statements)

References 100 publications

(158 reference statements)

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“…Both the zero-dimensional volume-averaged formalism [10,11] and the pseudo-one-dimensional plug-flow formalism [12,14,16] are implemented. The balance equations are averaged over the whole plasma domain in the zero-dimensional formalism, and steady or transient volume-averaged plasma quantities are calculated [54,55]. In the pseudoone-dimensional formalism, the equations are averaged over a much smaller plug-volume, that is infinitesimally small along the unidirectional laminar net mass flow field.…”

Section: Modelmentioning

confidence: 99%

“…This term is also neglected in the pseudo-one-dimensional formalism since the convective mass flow mechanism prevails the flux vector [14]. The wall loss of an ion i at the surfaces parallel to the mass flow field is defined as [55,64,65]…”

Section: Modelmentioning

confidence: 99%

“…The considered elastic collisions are tabulated in A13 with a reference to the considered cross-section. The energy loss due to the wall flux is given in the form [55,64]…”

Section: Modelmentioning

confidence: 99%

See 2 more Smart Citations

Zero-dimensional and pseudo-one-dimensional models of atmospheric-pressure plasma jets in binary and ternary mixtures of oxygen and nitrogen with helium background

Preissing

Steuer

et al. 2021

Plasma Sources Sci. Technol.

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A zero-dimensional (volume-averaged) and a pseudo-one-dimensional plug-flow (spatially resolved) model are developed to investigate atmospheric-pressure plasma jets operated with He, He/O2, He/N2 and He/N2/O2 mixtures. The models are coupled with the Boltzmann equation under the two-term approximation to self-consistently calculate the electron energy distribution function. An agreement is obtained between the zero-dimensional model calculations and the spatially averaged values of the plug-flow simulation results. The zero-dimensional model calculations are verified against spatially resolved simulation results and validated against a wide variety of measurement data from the literature. The nitric oxide (NO) concentration is thoroughly characterized for a variation of the gas mixture ratio, helium flow rate and absorbed power. An ‘effective’ and a hypothetical larger rate coefficient value for the reactive quenching N 2 ( A 3 Σ , B 3 Π ) + O ( P 3 ) → N O + N ( D 2 ) are used to estimate the role of the species N2(A3Σ, B3Π; v > 0) and multiple higher N2 electronically excited states instead of only N2(A3Σ, B3Π; v = 0) in this quenching. The NO concentration measurements at low power are better and almost identically captured by the simulations using the ‘effective’ and hypothetical values, respectively. Furthermore, the O ( P 3 ) density measurements under the same operation conditions are also better predicted by the simulations adopting these values. It is found that the contribution of the vibrationally excited nitrogen molecules N2(v ⩾ 13) to the net NO formation rate gains more significance at higher power. The vibrational distribution functions (VDFs) of molecular oxygen O2(v < 41) and nitrogen N2(v < 58) are investigated regarding their formation mechanisms and their responses to the variation of operation parameters. It is observed that the N2 VDF shows a stronger response than the O2 VDF. The sensitivity of the simulation results with respect to a variation of the VDF resolutions, wall reaction probabilities and synthetic air impurity levels is presented. The simulated plasma properties are sensitive to the variation, especially for a feed gas mixture containing nitrogen. The plug-flow model is validated against one-dimensional experimental data in the gas flow direction, and it is only used in case an analysis of the spatially resolved plasma properties inside the jet chamber is of interest. The increasing NO spatial concentration in the gas flow direction is saturated at a relatively high power. A stationary O2 VDF is obtained along the direction of the mass flow, while a continuously growing N2 VDF is observed until the jet nozzle.

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Section: Modelmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

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Zero-dimensional and pseudo-one-dimensional models of atmospheric-pressure plasma jets in binary and ternary mixtures of oxygen and nitrogen with helium background

Preissing

Steuer

et al. 2021

Plasma Sources Sci. Technol.

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“…The electron density follows from the particle balance as well as quasi neutrality and the electron temperature from the energy balance. The authors refer to earlier studies [15][16][17] for a validation and a verification of the global model of microwave-induced discharges in the considered pressure regime.…”

Section: Plasma Modelmentioning

confidence: 99%

Modelling of a miniature microwave driven nitrogen plasma jet and comparison to measurements

Klute

Kemaneci

Porteanu

et al. 2021

Plasma Sources Sci. Technol.

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The MMWICP (miniature microwave ICP) is a new plasma source using the induction principle. Recently Klute et al presented a mathematical model for the electromagnetic fields and power balance of the new device. In this work the electromagnetic model is coupled with a global chemistry model for nitrogen, based on the chemical reaction set of Thorsteinsson and Gudmundsson and customized for the geometry of the MMWICP. The combined model delivers a quantitative description for a non-thermal plasma at a pressure of p = 1000 Pa and a gas temperature of T g = 650-1600 K. Comparison with published experimental data shows a good agreement for the volume averaged plasma parameters at high power, for the spatial distribution of the discharge and for the microwave measurements. Furthermore, the balance of capacitive and inductive coupling in the absorbed power is analyzed. This leads to the interpretation of the discharge regime at an electron density of n e ≈ 6.4 × 10 18 m −3 as E/H-hybridmode with an capacitive and inductive component.

show abstract

“…The authors refer to earlier studies [15][16][17] for a validation and a verification of the global model of microwave-induced discharges in the considered pressure regime.…”

Section: B Plasma Modelmentioning

confidence: 99%

Modelling of a miniature microwave driven nitrogen plasma jet and comparison to measurements

Klute,

Kemaneci,

Porteanu

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The MMWICP (Miniature MicroWave ICP) is a new plasma source using the induction principle. Recently Klute et al. presented a mathematical model for the electromagnetic fields and power balance of the new device. In this work the electromagnetic model is coupled with a global chemistry model for nitrogen, based on the chemical reaction set of Thorsteinsson and Gudmundsson and customized for the geometry of the MMWICP. The combined model delivers a quantitative description for a non-thermal plasma at a pressure of p = 1000 Pa and a gas temperature of T g = 650-1600 K. Comparison with published experimental data shows a good agreement forthe volume averaged plasma parameters at high power, for the spatial distribution of the discharge and for the microwave measurements. Furthermore, the balance of capacitive and inductive coupling in the absorbed power is analyzed. This leads to the interpretation of the discharge regime at a electron density of n e ≈ 6.4×10 18 m −3 as E/H-hybridmode with an capacitive and inductive component.

show abstract

A global model of cylindrical and coaxial surface-wave discharges

Cited by 14 publications

References 100 publications

Zero-dimensional and pseudo-one-dimensional models of atmospheric-pressure plasma jets in binary and ternary mixtures of oxygen and nitrogen with helium background

Zero-dimensional and pseudo-one-dimensional models of atmospheric-pressure plasma jets in binary and ternary mixtures of oxygen and nitrogen with helium background

Modelling of a miniature microwave driven nitrogen plasma jet and comparison to measurements

Modelling of a miniature microwave driven nitrogen plasma jet and comparison to measurements

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