Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.

The free convection heat transfer of Cu-water nanofluids in a parallelogrammic enclosure filled with porous media is numerically analyzed. The bottom and top of the enclosure are insulated while the sidewalls are subject to limited temperature difference. The Darcy flow and the Tiwari and Das'...

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Main Authors: Mohammad Ghalambaz, Mikhail A Sheremet, Ioan Pop
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2015-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC4438067?pdf=render
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author Mohammad Ghalambaz
Mikhail A Sheremet
Ioan Pop
author_facet Mohammad Ghalambaz
Mikhail A Sheremet
Ioan Pop
author_sort Mohammad Ghalambaz
collection DOAJ
description The free convection heat transfer of Cu-water nanofluids in a parallelogrammic enclosure filled with porous media is numerically analyzed. The bottom and top of the enclosure are insulated while the sidewalls are subject to limited temperature difference. The Darcy flow and the Tiwari and Das' nanofluid models are considered. The governing dimensionless partial differential equations are numerically solved using a finite difference code. The results are reported for isotherms and streamlines as well as Nusselt number as a function of the volume fraction of nanoparticles, porosity, types of the porous matrix, inclination angle, aspect ratio and different Rayleigh numbers. It is found that the presence of the nanoparticles inside the enclosure deteriorates the heat transfer rate, which is caused due to the increase of dynamic viscosity by the presence of nanoparticles. Therefore, in applications in which the nanofluids are used for their advantages, such as enhanced dielectric properties or antibacterial properties, more caution for the heat transfer design of the enclosure is necessary.
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spelling doaj.art-cb6e0829157e4888b374af24d5dceb312022-12-21T19:43:42ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01105e012648610.1371/journal.pone.0126486Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.Mohammad GhalambazMikhail A SheremetIoan PopThe free convection heat transfer of Cu-water nanofluids in a parallelogrammic enclosure filled with porous media is numerically analyzed. The bottom and top of the enclosure are insulated while the sidewalls are subject to limited temperature difference. The Darcy flow and the Tiwari and Das' nanofluid models are considered. The governing dimensionless partial differential equations are numerically solved using a finite difference code. The results are reported for isotherms and streamlines as well as Nusselt number as a function of the volume fraction of nanoparticles, porosity, types of the porous matrix, inclination angle, aspect ratio and different Rayleigh numbers. It is found that the presence of the nanoparticles inside the enclosure deteriorates the heat transfer rate, which is caused due to the increase of dynamic viscosity by the presence of nanoparticles. Therefore, in applications in which the nanofluids are used for their advantages, such as enhanced dielectric properties or antibacterial properties, more caution for the heat transfer design of the enclosure is necessary.http://europepmc.org/articles/PMC4438067?pdf=render
spellingShingle Mohammad Ghalambaz
Mikhail A Sheremet
Ioan Pop
Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
PLoS ONE
title Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
title_full Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
title_fullStr Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
title_full_unstemmed Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
title_short Free convection in a parallelogrammic porous cavity filled with a nanofluid using Tiwari and Das' nanofluid model.
title_sort free convection in a parallelogrammic porous cavity filled with a nanofluid using tiwari and das nanofluid model
url http://europepmc.org/articles/PMC4438067?pdf=render
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