Flow behaviour of glycolated water suspensions of functionalized graphene nanoplatelets

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dc.contributor.author Gomez-Barreiro, S. en
dc.contributor.author Vallejo, J.P. en
dc.contributor.author Cabaleiro, D. en
dc.contributor.author Gracia-Fernandez, C. en
dc.contributor.author Fernandez-Seara, J. en
dc.contributor.author Lugo, L. en
dc.date.accessioned 2017-08-28T07:07:20Z
dc.date.available 2017-08-28T07:07:20Z
dc.date.issued 2016 en
dc.description Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016. en
dc.description.abstract The heat transfer performance of the conventional fluids used in heat exchange processes improves by dispersing nanoparticles with high thermal conductivity, as many researches have shown in the last decades. The heat transfer capability of a fluid depends on several physical properties among which the rheological behavior is very relevant, as we have previously pointed out. In this study, different samples of nanofluids have been analyzed by using a DHR-2 rotational rheometer of TA Instruments with concentric cylinder geometry in the temperature range from (278.15 to 323.15) K. The used base fluids were two different binary mixtures of propylene glycol and water at (10:90)% and (30:70)% mass ratios. Two different mass concentrations (viz. 0.25 and 0.5 wt.%) of graphene nanoplatelets functionalized with sulfonic acid (graphenit- HW6) were dispersed in these two base fluids. Firstly, with the goal of checking and calibrating the operation of the rheometer, the viscosity-shear stress curves for pure propylene glycol, Krytox GPL102 oil, and the two base fluids were experimentally determined. A detailed comparative study with those well-known data over the entire range of temperature was stabilized obtaining deviations in viscosity less than 3.5%. Then, the flow curves of the different nanofluid samples were studied at different temperatures to characterize their flow behavior. en
dc.format.extent 6 pages en
dc.format.medium PDF en
dc.identifier.uri http://hdl.handle.net/2263/61819
dc.language.iso en en
dc.publisher HEFAT en
dc.rights University of Pretoria en
dc.subject Glycolated water suspensions en
dc.subject Functionalized graphene nanoplatelets en
dc.title Flow behaviour of glycolated water suspensions of functionalized graphene nanoplatelets en
dc.type Presentation en


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