Carbon-nanotube nanofluid thermophysical properties and heat transfer by natural convection

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Li, Y.^1 ; Suzuki, S.^2 ; Inagaki, T.^1 ; Yamauchi, N.^3

Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki

316-8511, Japan^1

Graduate School of Science and Engineering, Ibaraki University, Japan^2

Fukushima National College of Technology, Japan^3

关键词: Flow properties;    Heat transfer characteristics;    High reliability;    High thermal conductivity;    High viscosities;    Non-Newtonian fluids;    Temperature dependence;    Thermal perspective;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012051/pdf
DOI  :  10.1088/1742-6596/557/1/012051

来源: IOP

【 摘 要 】

We measured the thermophysical properties of suspensions of carbon nanotubes in water as a type of nanofluid, and experimentally investigated their heat transfer characteristics in a horizontal, closed rectangular vessel. Using a previously constructed system for high- reliability measurement, we quantitatively determined their thermophysical properties and the temperature dependence of these properties. We also investigated the as yet unexplained mechanism of heat transport in carbon-nanotube nanofluids and their flow properties from a thermal perspective. The results indicated that these nanofluids are non-Newtonian fluids, whose high viscosity impedes convection and leads to a low heat transfer coefficient under natural convection, despite their high thermal conductivity.