Topic
Nanofluid
About: Nanofluid is a research topic. Over the lifetime, 23986 publications have been published within this topic receiving 677384 citations.
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TL;DR: In this article, the authors explored the micro-channel cooling benefits of water-based nanofluids containing small concentrations of Al 2 O 3, showing that the high thermal conductivity of nanoparticles is shown to enhance the single-phase heat transfer coefficient, especially for laminar flow.
567 citations
TL;DR: In this paper, the effects of Brownian motion on the effective viscosity and thermal conductivity of nanofluid were investigated. And the results were presented graphically in terms of streamlines, isotherms and isokinetic energy.
556 citations
TL;DR: In this article, effective thermal conductivity models of nanofluids are reviewed and comparisons between experimental findings and theoretical predictions are made, and the results show that there exist significant discrepancies among the experimental data available and between the experimental results and the theoretical model predictions.
Abstract: Adding small particles into a fluid in cooling and heating processes is one of the methods to increase the rate of heat transfer by convection between the fluid and the surface. In the past decade, a new class of fluids called nanofluids, in which particles of size 1–100 nm with high thermal conductivity are suspended in a conventional heat transfer base fluid, have been developed. It has been shown that nanofluids containing a small amount of metallic or nonmetallic particles, such as Al2O3, CuO, Cu, SiO2, TiO2, have increased thermal conductivity compared with the thermal conductivity of the base fluid. In this work, effective thermal conductivity models of nanofluids are reviewed and comparisons between experimental findings and theoretical predictions are made. The results show that there exist significant discrepancies among the experimental data available and between the experimental findings and the theoretical model predictions.
550 citations
TL;DR: In this article, the specific heat of water-based Al2O3 nanofluid with a differential scanning calorimeter was investigated and it was shown that the specific temperature decreases gradually as the nanoparticle volume fraction increases from 0.0% to 21.7%.
Abstract: In this letter, we have presented an experimental investigation of the specific heat cp of water-based Al2O3 nanofluid with a differential scanning calorimeter. The result indicates that the specific heat cp of nanofluid decreases gradually as the nanoparticle volume fraction ϕ increases from 0.0% to 21.7%. The relationship between them exhibits good agreement with the prediction from the thermal equilibrium model [Eq. (2)]. The other simple mixing model [Eq. (1)] fails to predict the specific heat cp of nanofluid.
549 citations
TL;DR: Considering the carbon nanotubes orientation distribution, a new model of effective thermal conductivity of CNTs-based composites is presented in this paper, which is valid for the transport properties of the CNT-based composite.
Abstract: Considering the carbon nanotubes’ (CNTs) orientation distribution a new model of effective thermal conductivity of CNTs-based composites is presented. Based on Maxwell theory, the formulae of calculating effective thermal conductivity of CNTs-based composites are given. The theoretical results on the effective thermal conductivity of CNTs/oil and CNTs/decene suspensions are in good agreement with the experimental data. The model is valid for the transport properties of the CNTs-based composites.
547 citations