Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements

The dielectric fluid was normally used to electrically shield high-voltage applications. However, recent studies on the electrohydrodynamic technique using the dielectric fluid were attentively conducted to obtain heat transfer enhancement in keeping with its electrical-insulating feature. This stud...

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Autores principales:	Jong Hyeon Son, Il Seouk Park
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Dielectric liquid Electrohydrodynamics Electro-thermo-convection Heat transfer enhancement Finite volume method Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/4517e8bad49a4f3097dec1a26ec352d4
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id	oai:doaj.org-article:4517e8bad49a4f3097dec1a26ec352d4
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spelling	oai:doaj.org-article:4517e8bad49a4f3097dec1a26ec352d42021-11-20T05:06:09ZNumerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements2214-157X10.1016/j.csite.2021.101650https://doaj.org/article/4517e8bad49a4f3097dec1a26ec352d42021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2214157X21008133https://doaj.org/toc/2214-157XThe dielectric fluid was normally used to electrically shield high-voltage applications. However, recent studies on the electrohydrodynamic technique using the dielectric fluid were attentively conducted to obtain heat transfer enhancement in keeping with its electrical-insulating feature. This study numerically investigates the electro-thermo-convection in a two-dimensional square enclosure with hot and cold vertical walls. The heat transfer rate in the free convection inside the enclosure can be significantly improved by the injection of space charges and working of the Coulomb force. In this study, we tested several electrode arrangements, including alternately arranged electrode pairs on walls, under the intense charge injection condition. Consequently, the vertical arrangements of the electrode pairs demonstrate a higher heat transfer rate than the horizontal arrangements. The heat transfer coefficient of the vertical electrode pairs at a Rayleigh number of 5000 and an electric Rayleigh number of 200 is larger than three times that of the horizontal electrode pairs. Using fluid with a Prandtl number of 10, the results of the stream lines, isotherms, and space charge distributions are summarized herein for various thermal and electrical buoyant conditions.Jong Hyeon SonIl Seouk ParkElsevierarticleDielectric liquidElectrohydrodynamicsElectro-thermo-convectionHeat transfer enhancementFinite volume methodEngineering (General). Civil engineering (General)TA1-2040ENCase Studies in Thermal Engineering, Vol 28, Iss , Pp 101650- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dielectric liquid Electrohydrodynamics Electro-thermo-convection Heat transfer enhancement Finite volume method Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Dielectric liquid Electrohydrodynamics Electro-thermo-convection Heat transfer enhancement Finite volume method Engineering (General). Civil engineering (General) TA1-2040 Jong Hyeon Son Il Seouk Park Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
description	The dielectric fluid was normally used to electrically shield high-voltage applications. However, recent studies on the electrohydrodynamic technique using the dielectric fluid were attentively conducted to obtain heat transfer enhancement in keeping with its electrical-insulating feature. This study numerically investigates the electro-thermo-convection in a two-dimensional square enclosure with hot and cold vertical walls. The heat transfer rate in the free convection inside the enclosure can be significantly improved by the injection of space charges and working of the Coulomb force. In this study, we tested several electrode arrangements, including alternately arranged electrode pairs on walls, under the intense charge injection condition. Consequently, the vertical arrangements of the electrode pairs demonstrate a higher heat transfer rate than the horizontal arrangements. The heat transfer coefficient of the vertical electrode pairs at a Rayleigh number of 5000 and an electric Rayleigh number of 200 is larger than three times that of the horizontal electrode pairs. Using fluid with a Prandtl number of 10, the results of the stream lines, isotherms, and space charge distributions are summarized herein for various thermal and electrical buoyant conditions.
format	article
author	Jong Hyeon Son Il Seouk Park
author_facet	Jong Hyeon Son Il Seouk Park
author_sort	Jong Hyeon Son
title	Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
title_short	Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
title_full	Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
title_fullStr	Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
title_full_unstemmed	Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
title_sort	numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/4517e8bad49a4f3097dec1a26ec352d4
work_keys_str_mv	AT jonghyeonson numericalinvestigationofelectrothermoconvectionandheattransferenhancementinasquareenclosurewithvariouselectrodearrangements AT ilseoukpark numericalinvestigationofelectrothermoconvectionandheattransferenhancementinasquareenclosurewithvariouselectrodearrangements
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Numerical investigation of electro-thermo-convection and heat transfer enhancement in a square enclosure with various electrode arrangements

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