Numerical study on natural convection of MWCNT nanofluids in a enclosure based on experimental conductivity and viscosity

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dc.contributor mohsen.sharifpur@up.ac.za en_ZA
dc.contributor.upauthor Garbadeen, I.D
dc.contributor.upauthor Sharifpur, Mohsen
dc.contributor.upauthor Slabber, Johan F.M.
dc.contributor.upauthor Meyer, Josua P.
dc.date.accessioned 2016-07-19T07:28:15Z
dc.date.available 2016-07-19T07:28:15Z
dc.date.issued 2015
dc.description.abstract Papers presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 20-23 July 2015. en_ZA
dc.description.abstract This study is motivated by the much reported enhancement in thermal conductivity of nanofluids and their potential as a replacement for conventional coolant fluids. Among the various factors considered in the selection of a coolant fluid, this study focused on the convective behaviour of nanofluids as demonstrated in a square enclosure with differentially heated side walls at low particle concentrations of 0 – 1 % and Ra number range of 104 to 106. Therefore, the study consists of numerical investigation by using experimentally determined thermal conductivities and viscosities of the nanofluid. A theoretical model was used for higher (though less practical) particle concentration of up to 8 %. The simulations were done by using CD Adapco’s Star-CCM+ Code (v 8.06) revealed an initial enhancement in the Nusselt number with varying particle concentration before rapidly falling to an average value that continues to diminish for the concentration range tested. This was true for different Ra numbers. The variation was attributed to the counteracting, non-linear effects of thermal conductivity and viscosity both of which increases by increasing particle concentration. The thermal conductivity effect were observed to be more dominant for a very narrow range of low particle concentration below 0.1 % while the viscous effect was found to be the more dominant at higher particle concentration above 0.1 %. en_ZA
dc.description.librarian am2016 en_ZA
dc.format.medium PDF en_ZA
dc.identifier.citation Garbadeen, ID, Sharifpur, M, Slabber, J & Meyer, JP 2015, 'Numerical study on natural convection of MWCNT nanofluids in a enclosure based on experimental conductivity and viscosity', Paper presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 20-23 July 2015. en_ZA
dc.identifier.isbn 97817759206873
dc.identifier.uri http://hdl.handle.net/2263/55926
dc.language.iso en en_ZA
dc.publisher International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics en_ZA
dc.rights © 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. en_ZA
dc.subject Nanofluids en_ZA
dc.subject Natural convection en_ZA
dc.subject MWCNT en_ZA
dc.subject Nusselt number en_ZA
dc.subject Thermal conductivity en_ZA
dc.subject Viscosity en_ZA
dc.title Numerical study on natural convection of MWCNT nanofluids in a enclosure based on experimental conductivity and viscosity en_ZA
dc.type Presentation en_ZA


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