Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids

Abstract This article investigates heat transfer enhancement in free convection flow of Maxwell nanofluids with carbon nanotubes (CNTs) over a vertically static plate with constant wall temperature. Two kinds of CNTs i.e. single walls carbon nanotubes (SWCNTs) and multiple walls carbon nanotubes (MW...

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Autores principales:	Sidra Aman, Ilyas Khan, Zulkhibri Ismail, Mohd Zuki Salleh, Qasem M. Al-Mdallal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c50bcf10563945c1a0edc7e44df9c864
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spelling	oai:doaj.org-article:c50bcf10563945c1a0edc7e44df9c8642021-12-02T11:41:10ZHeat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids10.1038/s41598-017-01358-32045-2322https://doaj.org/article/c50bcf10563945c1a0edc7e44df9c8642017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01358-3https://doaj.org/toc/2045-2322Abstract This article investigates heat transfer enhancement in free convection flow of Maxwell nanofluids with carbon nanotubes (CNTs) over a vertically static plate with constant wall temperature. Two kinds of CNTs i.e. single walls carbon nanotubes (SWCNTs) and multiple walls carbon nanotubes (MWCNTs) are suspended in four different types of base liquids (Kerosene oil, Engine oil, water and ethylene glycol). Kerosene oil-based nanofluids are given a special consideration due to their higher thermal conductivities, unique properties and applications. The problem is modelled in terms of PDE’s with initial and boundary conditions. Some relevant non-dimensional variables are inserted in order to transmute the governing problem into dimensionless form. The resulting problem is solved via Laplace transform technique and exact solutions for velocity, shear stress and temperature are acquired. These solutions are significantly controlled by the variations of parameters including the relaxation time, Prandtl number, Grashof number and nanoparticles volume fraction. Velocity and temperature increases with elevation in Grashof number while Shear stress minimizes with increasing Maxwell parameter. A comparison between SWCNTs and MWCNTs in each case is made. Moreover, a graph showing the comparison amongst four different types of nanofluids for both CNTs is also plotted.Sidra AmanIlyas KhanZulkhibri IsmailMohd Zuki SallehQasem M. Al-MdallalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sidra Aman Ilyas Khan Zulkhibri Ismail Mohd Zuki Salleh Qasem M. Al-Mdallal Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
description	Abstract This article investigates heat transfer enhancement in free convection flow of Maxwell nanofluids with carbon nanotubes (CNTs) over a vertically static plate with constant wall temperature. Two kinds of CNTs i.e. single walls carbon nanotubes (SWCNTs) and multiple walls carbon nanotubes (MWCNTs) are suspended in four different types of base liquids (Kerosene oil, Engine oil, water and ethylene glycol). Kerosene oil-based nanofluids are given a special consideration due to their higher thermal conductivities, unique properties and applications. The problem is modelled in terms of PDE’s with initial and boundary conditions. Some relevant non-dimensional variables are inserted in order to transmute the governing problem into dimensionless form. The resulting problem is solved via Laplace transform technique and exact solutions for velocity, shear stress and temperature are acquired. These solutions are significantly controlled by the variations of parameters including the relaxation time, Prandtl number, Grashof number and nanoparticles volume fraction. Velocity and temperature increases with elevation in Grashof number while Shear stress minimizes with increasing Maxwell parameter. A comparison between SWCNTs and MWCNTs in each case is made. Moreover, a graph showing the comparison amongst four different types of nanofluids for both CNTs is also plotted.
format	article
author	Sidra Aman Ilyas Khan Zulkhibri Ismail Mohd Zuki Salleh Qasem M. Al-Mdallal
author_facet	Sidra Aman Ilyas Khan Zulkhibri Ismail Mohd Zuki Salleh Qasem M. Al-Mdallal
author_sort	Sidra Aman
title	Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
title_short	Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
title_full	Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
title_fullStr	Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
title_full_unstemmed	Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids
title_sort	heat transfer enhancement in free convection flow of cnts maxwell nanofluids with four different types of molecular liquids
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/c50bcf10563945c1a0edc7e44df9c864
work_keys_str_mv	AT sidraaman heattransferenhancementinfreeconvectionflowofcntsmaxwellnanofluidswithfourdifferenttypesofmolecularliquids AT ilyaskhan heattransferenhancementinfreeconvectionflowofcntsmaxwellnanofluidswithfourdifferenttypesofmolecularliquids AT zulkhibriismail heattransferenhancementinfreeconvectionflowofcntsmaxwellnanofluidswithfourdifferenttypesofmolecularliquids AT mohdzukisalleh heattransferenhancementinfreeconvectionflowofcntsmaxwellnanofluidswithfourdifferenttypesofmolecularliquids AT qasemmalmdallal heattransferenhancementinfreeconvectionflowofcntsmaxwellnanofluidswithfourdifferenttypesofmolecularliquids
_version_	1718395483991310336

Heat transfer enhancement in free convection flow of CNTs Maxwell nanofluids with four different types of molecular liquids

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