The Design of a Python Library for the Automatic Definition and Simulation of Transient Ionization Fronts

Wong, T.; Timoshkin, I. V.; MacGregor, S.J.; Wilson, M. P.; Given, M.J.

doi:10.1109/access.2023.3257724

Cited by 3 publications

(1 citation statement)

References 56 publications

(98 reference statements)

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“…The plasma fluid model (PFM) is commonly employed for simulating atmospheric pressure air discharge due to its low resource consumption [23,39,40]. Therefore, a 1D PFM with photoionisation is implemented in this study by COMSOL Multiphysics software with a built-in plasma module and Helmholtz equation solver to compare the discharge dynamics at different periods in the DF discharge.…”

Section: Numerical Modellingmentioning

confidence: 99%

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

He,

Peng,

et al. 2024

High Voltage

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A dual‐frequency (DF) dielectric barrier discharge, excited by the superposition of a 50 Hz low frequency (LF) and a 5000 Hz intermediate frequency (IF), is proposed to enhance discharge. The effect of the LF voltage component on the breakdown behaviour of the DF discharge during different periods has been studied both experimentally and numerically. The number of high‐current pulses rises as the LF voltage increases. The statistical analysis shows that the number of the current pulse amplitude above 80 mA in the DF discharge reaches nearly 6 times that in the IF discharge. Additionally, the total discharge energy in the DF discharge is significantly higher than that in the IF discharge. The simulation reproduces the temporal variation of the breakdown behaviours in the DF discharge. The simulated results reveal that the maximal electric field strength of the breakdown process is greater in the DF discharge compared to the IF discharge during a half‐period of DF. Finally, the comparison between the IF and DF discharges exhibits that the LF voltage regulates the accumulation of residual charged species on the dielectric surface after the breakdown by modulating the residual voltage between the air gap.

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Section: Numerical Modellingmentioning

confidence: 99%

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

He,

Peng,

et al. 2024

High Voltage

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A computational study on the effects of fast-rising voltage on ionization fronts initiated in sub-mm air and CO$$_{2}$$ gaps

Wong,

Timoshkin,

MacGregor

et al. 2024

Sci Rep

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Gas discharge and breakdown phenomena have become increasingly important for the development of an ever-growing number of applications. The need for compact and miniaturized systems within power, pulsed power, semiconductor, and power electronic industries has led to the imposing of significant operating electric field stresses on components, even within applications with low operating voltages. Consequently, the interest in gas discharge processes in sub-millimeter and microscale gaps has grown, as the understanding of their initiation and propagation is critical to the further optimization of these technologies. In this work, a computational study of primary ionization fronts has been conducted, which systematically investigated the role of voltage rate-of-rise in point-plane and point-point electrode geometries with an inter-electrode gap maintained at 250 $$\upmu$$ μ m and a needle radius of 80 $$\upmu$$ μ m. Using the hydrodynamic approach with the local mean energy approximation, along with simplified plasma chemistry, simulations have been performed under positive and negative ramp voltages, rising at 50, 25, 16.67, 12.5, and 10 kV/ns in synthetic air and in pure CO$$_{2}$$ 2 . Results on the developed electric field, electron densities, and propagation velocities are presented and discussed. Effects on the cathode sheath thickness scaling with voltage rate-of-rise have been additionally analyzed, the mechanisms behind these effects and their potential impacts are discussed. The work conducted in this study contributes towards an increased understanding of the gas discharge process, under fast-transients and nonuniform electric fields, with relevance to microelectromechanical, power, and pulsed power system design.

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Modelling of Transient Discharges Along a Sub-mm Air-Solid Dielectric Interface Under Fast-rising Ramp Voltages

Wong,

Timoshkin,

MacGregor

et al. 2023

2023 IEEE Pulsed Power Conference (PPC)

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The Design of a Python Library for the Automatic Definition and Simulation of Transient Ionization Fronts

Cited by 3 publications

References 56 publications

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

Experimental and numerical study on atmospheric‐pressure air dielectric barrier discharge via 50 Hz/5000 Hz dual‐frequency excitation

A computational study on the effects of fast-rising voltage on ionization fronts initiated in sub-mm air and CO$$_{2}$$ gaps

Modelling of Transient Discharges Along a Sub-mm Air-Solid Dielectric Interface Under Fast-rising Ramp Voltages

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