Thermal conductivity and molecular heat transport of nanofluids.
Thermal conductivity and molecular heat transport of nanofluids.
复制标题
纳米流体的热导率和分子热传输。
DOI：
10.1039/c8ra08987f
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发表时间：
2019-01-18
期刊：
影响因子：
3.9
通讯作者：
Garner, Colin P.
中科院分区：
文献类型：
--
作者：
Dolatabadi, Nader;Rahmani, Ramin;Rahnejat, Homer;Garner, Colin P.
水和乙二醇等流体介质通常是很差的热导体。纳米颗粒可以显着改善流体的热性能。尽管进行了大量的实验和理论研究，但纳米流体中热传输的基本物理原理尚未得到很好的理解。此外，纳米级能量传输和纳米流体的体积特性之间的联系尚未完全建立。本文提出了一个热导率模型，封装了固液界面热阻、颗粒形状因子以及纳米颗粒表面物理吸附流体层的热导率变化。开发的热导率模型集成了界面卡皮查电阻、纳米层的特性、对流扩散和表面能与毛细管冷凝。此外，使用 Brunauer-Emmett-Teller (BET) 等温线和微/纳米弯月面产生的冷凝压力来预测纳米层的厚度。如此全面的纳米颗粒热导率模型和系统研究迄今尚未见文献报道。使用公开文献中提供的实验数据来评估热导率模型。开发的纳米流体导热率模型集成了界面卡皮查阻力、纳米层的特性、对流扩散和毛细管冷凝的表面能。
Fluid media such as water and ethylene glycol are usually quite poor conductors of heat. Nanoparticles can improve the thermal properties of fluids in a remarkable manner. Despite a plethora of experimental and theoretical studies, the underlying physics of heat transport in nanofluids is not yet well understood. Furthermore, the link between nanoscale energy transport and bulk properties of nanofluids is not fully established. This paper presents a thermal conductivity model, encapsulating solid–liquid interfacial thermal resistance, particle shape factor and the variation of thermal conductivity across a physisorbed fluidic layer on a nanoparticle surface. The developed model for thermal conductivity integrates the interfacial Kapitza resistance, the characteristics of a nanolayer, convective diffusion and surface energy with capillary condensation. In addition, the thickness of the nanolayer is predicted using the Brunauer–Emmett–Teller (BET) isotherms and micro/nano-menisci generated pressures of condensation. Such a comprehensive model for thermal conductivity of nanoparticles and systematic study has not hitherto been reported in the literature. The thermal conductivity model is evaluated using experimental data available in open literature. The developed model for thermal conductivity of nanofluids integrates the interfacial Kapitza resistance, the characteristics of the nanolayer, convective diffusion and surface energy with capillary condensation.
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DOI：
10.1021/i160003a005
发表时间：
1962-01-01
期刊：
INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS
影响因子：
--
作者：
HAMILTON, RL;CROSSER, OK
通讯作者：
CROSSER, OK
影响因子：
3.9
作者：
Briscoe, WH;Horn, RG
通讯作者：
Horn, RG
影响因子：
2.4
作者：
Einstein, A
通讯作者：
Einstein, A
影响因子：
15
作者：
Langmuir, I
通讯作者：
Langmuir, I
影响因子：
--
作者：
Das, SK;Putra, N;Roetzel, W
通讯作者：
Roetzel, W