Simulation of ionization-wave discharges: a direct comparison between the fluid model and E-FISH measurements

Abstract

For a long period, there was a resolution gap between numerical modeling and experimental measurements, making it hard to conduct a direct comparison between them, but they are now developing in parallel. In this work, we numerically study diffusive ionization wave and fast ionization wave discharge experiments using recently published electric-field-induced second-harmonic (E-FISH) data together with a classical fluid model. We propose a pressure-E/N range for the drift diffusion approximation and a pressure-grid range for the local field/mean energy approximation of the fluid model. The three-term Helmholtz photoionization model is generalized using parameters given for N 2 , O 2 , CO 2 , and air. The capabilities of the classical fluid method for modeling the inception, propagation, and channel breakdown stages are studied. The calculated electric field evolution of the ionization is compared with E-FISH measurements in the discharge development and gap-closing stages. The influence of electrode shape and predefined electron density on the streamer morphology and the long-standing inception problem of the ionization waves are discussed in detail. Within the application range of the classical fluid model, good agreement can be achieved between calculation and measurement.

Triboelectric Plasma CO2 Reduction Reaching a Mechanical Energy Conversion Efficiency of 2.3%

“…The code solved a set of drift‐diffusion‐reaction equations coupled with Poisson's equation, and detailed mathematical formulas and proofs could be found in the literature. [ 8 , 22 ] The code used in this work has been well validated by high resolution experimental measurements of electric field, optical emission, discharge morphology, as well as voltage‐current profiles. Details could be found in the literature for point‐to‐plane discharges, in the literature for surface discharges, and in the literature for point‐to‐point discharges.…”

“…Triboelectric plasma simulation and analysis were performed using the method previously reported in the literature. [ 22 , 23 ]…”

Morphology of positive ionization waves in atmospheric pressure air: influence of electrode set-up geometry

“…Recently, several experimental and numerical studies in point-to-plane geometry in air gaps of about 1 cm at atmospheric pressure have reported images of axisymmetric diffuse discharges with maximum radius of several centimeters as reviewed in Naidis et al (2018) and shown since then in Brisset et al (2019); Chng et al (2019); Tarasenko et al (2020); Tarasenko (2020); Chen et al (2020); Bourdon et al (2020); Babaeva and Naidis (2021); Zhu et al (2021). These discharges are obtained using high voltage pulses (with maximum voltages being five or ten times higher than classical steady-state breakdown levels) applied with sub-nanosecond and nanosecond rise times.…”

Streamer dynamics and charge self‐erasing of two counter‐propagating plasmas in repetitively pulsed surface dielectric barrier discharge

“…To make the simulation of air discharge credible and manageable, 61 main reactions between 25 different species are considered in the series of reactions. In order to obtain a more accurate date in pulsed SDBD, the local energy approximation is adopted in our numerical model [40,41]. The time dependent solver and a backward differentiation formula method are proposed for the numerical simulation.…”