Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 35, Issue 9, Pages 1230-1240Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2013.834423
Keywords
Convective heat transfer; graphene nanofluid; pressure drop; stability; turbulent flow
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Turbulent convective heat transfer of graphene-water nanofluids with various concentrations inside a uniformly heated circular tube is studied experimentally. For this purpose, experiments are conducted to measure thermal conductivity, viscosity, pressure drop, and heat transfer coefficient. Results show enhancement of thermal conductivity and moderate increment of viscosity with addition of low amounts of nanoparticles. Moreover, heat transfer coefficient shows relatively high augmentation, and pressure drop remains unchanged. The maximum enhancements are 10.30%, 4.95%, and 6.04% for thermal conductivity, viscosity, and heat transfer coefficient, respectively. UV-Vis spectroscopy results show that the nanofluids are highly stable.
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