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Experimental investigation on viscosity of water-based Al2O3 and TiO2 nanofluids
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0001-5380-975X
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.
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2015 (English)In: Rheologica Acta, ISSN 0035-4511, E-ISSN 1435-1528, Vol. 54, no 5, 411-422 p.Article in journal (Refereed) Published
Abstract [en]

This article investigates the influence of temperature, concentration, and size of nanoparticles, and addition of surfactants on dynamic viscosity of water-based nanofluids containing alumina (Al2O3) and titania (TiO2) nanoparticles. Two viscometers, a capillary and a falling ball, were used for the measurements in the temperature range of 20-50 A degrees C and the particle concentration of 3-14.3 wt.%. The results indicate that the viscosity of nanofluids is reduced by increasing the temperature, similar to their base fluids. Moreover, surfactants, which are used to improve the shelf stability of nanofluids, most likely increase their viscosity. The correlations derived from the linear fluid theory such as Einstein and Batchelor, especially for solid concentration above 1.5 wt.% are not accurate to predict viscosity of nanofluids, while the modified Krieger-Dougherty equation estimates viscosity of nanofluids with acceptable accuracy in a specific range of solid particle size to aggregate size.

Place, publisher, year, edition, pages
2015. Vol. 54, no 5, 411-422 p.
Keyword [en]
Nanofluid, Viscosity, Temperature, Particle size, Concentration, Surfactant, Al2O3, TiO2
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-171683DOI: 10.1007/s00397-015-0838-yISI: 000352848300007OAI: oai:DiVA.org:kth-171683DiVA: diva2:844966
Note

QC 20150810

Available from: 2015-08-10 Created: 2015-08-05 Last updated: 2017-12-04Bibliographically approved

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Saleemi, MohsinPalm, BjörnToprak, Muhammet S.

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Jarahnejad, MariamHaghighi, Ehsan B.Saleemi, MohsinNikkam, NaderKhodabandeh, RahmatollahPalm, BjörnToprak, Muhammet S.Muhammed, Mamoun
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Applied Thermodynamics and RefrigerationFunctional Materials, FNM
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