Heat conduction mechanisms in nanofluids and suspensions
By Jianjian Wang, R. Zheng, Jinwei Gao, Gang Chen. 2012
163 citations recorded by the source corpus.
Summary Nanofluids, liquids containing suspensions of nanoparticles, have been reported by some groups to exhibit substantially higher thermal conductivity than that of their corresponding base fluids that cannot be explained by existing theories. However, the reported high thermal conductivity sometimes cannot be reproduced by others. Potential mechanisms leading to this enhancement are still under scrutiny. In this paper, we first take a critical review of heat conduction mechanisms proposed in literature, and then summarize our work. Our experimental studies demonstrate that nanoparticle clustering is the key contributor to the thermal conductivity enhancement. Guided by this insight, we use graphite flakes as additives and develop a method to prepare stable graphite suspensions with large thermal conductivity enhancement in water and oil. We also observe thermal percolation phenomenon and explained the phenomenon based on combined optical and AC impedance spectroscopy studies. We demonstrate temperature regulation of electrical and thermal properties of graphite suspensions through solid–liquid phase change, which may potentially be useful in energy systems in the future.
Subfields: Biomedical Engineering, Materials Chemistry, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/d9c8e1a878a4e6da63d3f19535f6c280d531dac2
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In Biomedical Engineering
In Materials Chemistry
In Mechanical Engineering
Citations in the corpus
- A review on the application of nanofluids in vehicle engine cooling system (2015, unknown): “[42] have provided an excellent review on the effects of several parameters to determine the effective thermal conductivity of nanofluids.”
- The effects of graphite nanoparticles, phase change material, and film cooling on the solar still performance (2016, methodology): “In this paper, the flake graphite nanoparticles (FGN) were chosen as the nanomaterial in consideration of its relative high thermal conductivity [46,47], low cost and high solar absorptivity as compared with most of the nanomaterials.”
- A Review of Thermal Conductivity Models for Nanofluids (2015, background): “The different factors that potentially influence the heat transfer enhancement of nanofluids are Brownian motion of nanoparticles, clustering of nanoparticles, nanolayering of the liquid at the liquid/nanoparticle interface, ballistic transport and nonlocal effect, thermophoretic effect, and near-fi”