Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges

A plasma discharge in a Helium gas reactor at different pressures and at low currents (0.25–0.45 A) has been investigated by Computational Fluid Dynamic modeling coupled with the Maxwell’s equations. The results show different discharge dynamics across the pressure range (0.1–8 MPa), with an arc dis...

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Autores principales:	Avinash Maharaj, Antonio D’Angola, Gianpiero Colonna, Samuel A. Iwarere
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	plasma discharges atmospheric pressure high pressure helium gas low current Physics QC1-999
Acceso en línea:	https://doaj.org/article/62fb87cacc684ce0a722a6cde391e100
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spelling	oai:doaj.org-article:62fb87cacc684ce0a722a6cde391e1002021-11-08T12:07:21ZModeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges2296-424X10.3389/fphy.2021.748113https://doaj.org/article/62fb87cacc684ce0a722a6cde391e1002021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphy.2021.748113/fullhttps://doaj.org/toc/2296-424XA plasma discharge in a Helium gas reactor at different pressures and at low currents (0.25–0.45 A) has been investigated by Computational Fluid Dynamic modeling coupled with the Maxwell’s equations. The results show different discharge dynamics across the pressure range (0.1–8 MPa), with an arc discharge obtained at high pressure and a low current arc discharge observed at atmospheric pressure. A large density gradient at higher pressure causes a strong natural convection effect in the reactor. This density gradient affects drastically the discharge shape and the velocity field at high pressures while at atmospheric pressure, a lower density gradient was observed resulting in a low velocity magnitude. It has been observed that the velocity magnitude is not affected by the electric current. The discharge electric potential has been calculated by considering the electrical characterization of the electrodes and numerical results have been compared with experimental results. The comparison shows a good agreement between the measured and calculated discharge electric potential at lower pressures. These devices can be used as plasma sources for wastewater treatment.Avinash MaharajAntonio D’AngolaAntonio D’AngolaGianpiero ColonnaSamuel A. IwarereSamuel A. IwarereFrontiers Media S.A.articleplasma dischargesatmospheric pressurehigh pressurehelium gaslow currentPhysicsQC1-999ENFrontiers in Physics, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	plasma discharges atmospheric pressure high pressure helium gas low current Physics QC1-999
spellingShingle	plasma discharges atmospheric pressure high pressure helium gas low current Physics QC1-999 Avinash Maharaj Antonio D’Angola Antonio D’Angola Gianpiero Colonna Samuel A. Iwarere Samuel A. Iwarere Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
description	A plasma discharge in a Helium gas reactor at different pressures and at low currents (0.25–0.45 A) has been investigated by Computational Fluid Dynamic modeling coupled with the Maxwell’s equations. The results show different discharge dynamics across the pressure range (0.1–8 MPa), with an arc discharge obtained at high pressure and a low current arc discharge observed at atmospheric pressure. A large density gradient at higher pressure causes a strong natural convection effect in the reactor. This density gradient affects drastically the discharge shape and the velocity field at high pressures while at atmospheric pressure, a lower density gradient was observed resulting in a low velocity magnitude. It has been observed that the velocity magnitude is not affected by the electric current. The discharge electric potential has been calculated by considering the electrical characterization of the electrodes and numerical results have been compared with experimental results. The comparison shows a good agreement between the measured and calculated discharge electric potential at lower pressures. These devices can be used as plasma sources for wastewater treatment.
format	article
author	Avinash Maharaj Antonio D’Angola Antonio D’Angola Gianpiero Colonna Samuel A. Iwarere Samuel A. Iwarere
author_facet	Avinash Maharaj Antonio D’Angola Antonio D’Angola Gianpiero Colonna Samuel A. Iwarere Samuel A. Iwarere
author_sort	Avinash Maharaj
title	Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
title_short	Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
title_full	Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
title_fullStr	Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
title_full_unstemmed	Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges
title_sort	modeling and simulation of low current atmospheric and high-pressure helium plasma discharges
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/62fb87cacc684ce0a722a6cde391e100
work_keys_str_mv	AT avinashmaharaj modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges AT antoniodangola modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges AT antoniodangola modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges AT gianpierocolonna modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges AT samuelaiwarere modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges AT samuelaiwarere modelingandsimulationoflowcurrentatmosphericandhighpressureheliumplasmadischarges
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Modeling and Simulation of Low Current Atmospheric and High-Pressure Helium Plasma Discharges

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