Experiments have been conducted to characterize the viscosity, thermal conductivity, and Nusselt number of aluminum oxide (Al2O3) nanoparticle dispersions at 6% vol. in liquid water flowing through circular tubes. Rheological characterization of the Al2O3–water nanofluid has shown that it exhibits a Newtonian fluid behavior for the shear rate range of 6 to 122 s−1 between 6 and 75°C. Measurements of the nanofluid thermal conductivity have been performed for temperatures between 6 and 55°C, and were found to be 8 to 17% higher than that of water. Heat transfer measurements for nanofluid flow in laminar thermal entry region have been conducted for three different test sections with L/D of 155, 194, and 299. The experimental results within this study indicate that the heat transfer characteristics of the Al2O3–water nanofluid flow are largely in agreement with conventional theory for single-phase flow.
- Heat Transfer Division
Experimental Heat Transfer Study of Aluminum Oxide Nanofluid Flow in Tubes for Laminar Thermal Entry Region
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Tang, CC, Tiwari, S, & Cox, MW. "Experimental Heat Transfer Study of Aluminum Oxide Nanofluid Flow in Tubes for Laminar Thermal Entry Region." Proceedings of the ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamental Research in Heat Transfer. Minneapolis, Minnesota, USA. July 14–19, 2013. V001T03A034. ASME. https://doi.org/10.1115/HT2013-17550
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