Journal ArticleDOI
Anomalous thermal conductivity enhancement in nanotube suspensions
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TLDR
In this paper, the authors have produced nanotube-in-oil suspensions and measured their effective thermal conductivity, which is anomalously greater than theoretical predictions and is nonlinear with nanotubes loadings.Abstract:
We have produced nanotube-in-oil suspensions and measured their effective thermal conductivity. The measured thermal conductivity is anomalously greater than theoretical predictions and is nonlinear with nanotube loadings. The anomalous phenomena show the fundamental limits of conventional heat conduction models for solid/liquid suspensions. We have suggested physical concepts for understanding the anomalous thermal behavior of nanotube suspensions. In comparison with other nanostructured materials dispersed in fluids, the nanotubes provide the highest thermal conductivity enhancement, opening the door to a wide range of nanotube applications.read more
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Stability, rheology and thermal analysis of functionalized alumina- thermal oil-based nanofluids for advanced cooling systems
TL;DR: In this article, the surface characterizations of functionalized nanoparticles are performed using different analysis such as XRD, EDS, SEM, TEM and FTIR to ensure long-term stability of nanofluids.
Journal ArticleDOI
Thermal Percolation in Stable Graphite Suspensions
Ruiting Zheng,Jinwei Gao,Jinwei Gao,Jianjian Wang,Shien-Ping Feng,Shien-Ping Feng,Hiroko Ohtani,Jinbo Wang,Jinbo Wang,Gang Chen +9 more
TL;DR: It is reported that graphite suspensions show distinct behavior in the thermal conductivity at the electrical percolation threshold, including a sharp kink at the percolated threshold, below which Thermal conductivity increases rapidly while above which the rate of increase is smaller, contrary to the electricalPercolation behavior.
Journal ArticleDOI
Review of solar water heaters incorporating solid-liquid organic phase change materials as thermal storage
TL;DR: In this article, the effect of polymer/porous materials composition, nanoparticles loading and photo-absorption properties of photothermal energy conversion material on the thermal stability, thermal conductivity and light absorption of composite solid-liquid organic PCMs are reviewed and analyzed.
Journal ArticleDOI
Absorption and scattering properties of carbon nanohorn-based nanofluids for direct sunlight absorbers
Luca Mercatelli,Elisa Sani,Giovanni Zaccanti,Fabrizio Martelli,Paola Di Ninni,Simona Barison,Cesare Pagura,Filippo Agresti,David Jafrancesco +8 more
TL;DR: The observed nanoparticle-induced differences in optical properties appeared promising, leading to a considerably higher sunlight absorption with respect to the pure base fluids, and together with the possible chemical functionalization of carbon nanohorns, make this new kind of nanofluids very interesting for increasing the overall efficiency of the sunlight exploiting device.
Journal ArticleDOI
Effect of alumina nanoparticles in the fluid on heat transfer in double-pipe heat exchanger system
TL;DR: In this article, the authors investigated the convective heat transfer coefficient of nanofluids made of several alumina nanoparticles and transformer oil which flow through a double pipe heat exchanger system in the laminar flow regime.
References
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Journal ArticleDOI
Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
Book
A Treatise on Electricity and Magnetism
TL;DR: The most influential nineteenth-century scientist for twentieth-century physics, James Clerk Maxwell (1831-1879) demonstrated that electricity, magnetism and light are all manifestations of the same phenomenon: the electromagnetic field as discussed by the authors.
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Physical properties of carbon nanotubes
TL;DR: In this paper, an introductory textbook for graduate students and researchers from various fields of science who wish to learn about carbon nanotubes is presented, focusing on the basic principles behind the physical properties and giving the background necessary to understand the recent developments.
Journal ArticleDOI
Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles
TL;DR: In this paper, it was shown that a "nanofluid" consisting of copper nanometer-sized particles dispersed in ethylene glycol has a much higher effective thermal conductivity than either pure or pure glycol or even polyethylene glycol containing the same volume fraction of dispersed oxide nanoparticles.
Journal ArticleDOI
Thermal Conductivity of Heterogeneous Two-Component Systems
R. L. Hamilton,O. K. Crosser +1 more
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