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Experimental and numerical investigation of heat transfer in CNT nanofluids.
- Source :
-
Journal of Experimental Nanoscience . May2015, Vol. 10 Issue 7, p545-563. 19p. - Publication Year :
- 2015
-
Abstract
- Nanofluids with their enhanced thermal conductivity are believed to be a promising coolant in heat transfer applications. In this study, carbon nanotube (CNT) nanofluids of 0.01 wt%, stabilised by 1.0 wt% gum arabic were used as a cooling liquid in a concentric tube laminar flow heat exchanger. The flow rate of cold fluid varied from 10 to 50 g/s. Both experimental and numerical simulations were carried out to determine the heat transfer enhancement using CNT nanofluids. Computational fluid dynamics (CFD) simulations were carried out using Fluent v 6.3 by assuming single-phase approximation. Thermal conductivity, density and rheology of the nanofluid were also measured as a function of temperature. The results showed thermal conductivity enhancement from 4% to 125% and nearly 70% enhancement in heat transfer with increase in flow rate. Numerical results exhibited good agreement with the experimental results with a deviation of. CNT nanofluids at 0.01 wt% CNTs showed Newtonian behaviour with no significant increase in the density. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17458080
- Volume :
- 10
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Journal of Experimental Nanoscience
- Publication Type :
- Academic Journal
- Accession number :
- 101047447
- Full Text :
- https://doi.org/10.1080/17458080.2013.848296