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
Citations
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Journal ArticleDOI
Carbon nanotube thermal transport: Ballistic to diffusive
Jian Wang,Jian-Sheng Wang +1 more
TL;DR: In this paper, the expression l0∕(l0+L) for the energy transmission covering both ballistic and diffusive regimes, where l0 is mean free path and L is system length, was proposed.
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Hydromagnetic slip flow of nanofluid over a curved stretching surface with heat generation and thermal radiation
TL;DR: In this article, the authors discuss the flow and heat transfer in a two-dimensional boundary layer flow of an electrically conducting nanofluid over a curved stretching sheet coiled in a circle of radius R. The mathematical model of the flow situation under consideration is developed using a curvilinear coordinates system which results in a set of partial differential equations.
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A review of studies using nanofluids in flat-plate and direct absorption solar collectors
Pankaj Raj,Sudhakar Subudhi +1 more
TL;DR: The use of nanofluid on flat plate solar collector (FPSC) and direct absorption solar collector can be identified as an effective way to enhance the performance of solar collector as discussed by the authors.
Journal ArticleDOI
Estimation of thermal conductivity of Al2O3/water (40%)–ethylene glycol (60%) by artificial neural network and correlation using experimental data
Mohammad Hemmat Esfe,Wei-Mon Yan,Masoud Afrand,Masoud Sarraf,Davood Toghraie,Mahidzal Dahari +5 more
TL;DR: The results indicate that artificial neural networks can precisely estimate the experimental data of thermal conductivity of Al 2 O 3 /water (40%)–ethylene glycol (60%) nanofluids.
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Investigating the diameter of solid particles effects on a laminar nanofluid flow in a curved tube using a two phase approach
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TL;DR: In this article, the authors report the results of their numerical studies on laminar mixed convection heat transfer in a circular curved tube with a nanofluid consisting of water and 1 ǫvol% Al 2 O 3.
References
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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.
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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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