Reding Brian, Khayet Mohamed
Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Avda. Complutense s/n, 28040, Madrid, Spain.
Sci Rep. 2022 Jun 10;12(1):9603. doi: 10.1038/s41598-022-14204-y.
Owing to their outstanding characteristics, carbon based nanofluids (CbNFs) have been applied to various advanced heat transfer and cooling technologies. It was claimed that these CbNFs can considerably improve the properties of the base working fluids. Among all the thermal characteristics, the thermal conductivity (λ) is regarded as the primary parameter to be considered for the application of nanofluids (NFs). In the present research study we measured for the first time both λ and thermal diffusivity (a) of very stable fullerene (C)-based NFs in liquid phase (1,2,3,4-tetrahydronaphthalene and 1,2-dicholorobenzene) by the transient multi-current hot wire technique at atmospheric pressure in a wide range of temperature (254-323 K). Similar to the base liquids (BLs), we observed a slight decrease in λ with an increase in temperature. Additionally, compared to the BLs λ was reduced upon the addition of C. The results were compared with the predicted ones using different theoretical models. Not much variation in a was observed between the C NFs and the corresponding BLs due partly to the small variation of λ with the addition of C.
由于其优异的特性，碳基纳米流体（CbNFs）已被应用于各种先进的传热和冷却技术。据称，这些CbNFs可以显著改善基础工作流体的性能。在所有热特性中，热导率（λ）被视为纳米流体（NFs）应用中要考虑的主要参数。在本研究中，我们首次在大气压下，通过瞬态多电流热线技术，在很宽的温度范围（254 - 323 K）内，测量了非常稳定的富勒烯（C）基纳米流体在液相（1,2,3,4 - 四氢萘和1,2 - 二氯苯）中的λ和热扩散率（a）。与基础液体（BLs）类似，我们观察到λ随温度升高略有下降。此外，与BLs相比，添加C后λ降低。将结果与使用不同理论模型预测的结果进行了比较。由于添加C后λ变化较小，C基纳米流体和相应的BLs之间未观察到a有太大变化。
