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Enhancing thermal conductivity of fluids with nano-particles

01 Jan 1995-Vol. 231, pp 99-105
About: The article was published on 1995-01-01 and is currently open access. It has received 7263 citations till now. The article focuses on the topics: Thermal conductivity & Nanoparticle.
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Journal ArticleDOI
TL;DR: In this article, the thermal conductivity of Al 2 O 3 -EG nanofluids has been examined using a KD2-Pro thermal analyzer and two new correlations with very high accuracy were suggested.

184 citations


Cites methods from "Enhancing thermal conductivity of f..."

  • ...Using nanofluid is one of the most important ways to improve the heat transfer which was introduced by Choi [1]....

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Journal ArticleDOI
TL;DR: Recent advances in the last decade by researchers in both pool boiling and convective boiling applications, with nanofluids as the working fluid are covered, in terms of enhancements, and degradations in the nucleate boiling heat transfer and critical heat flux.
Abstract: There has been increasing interest of late in nanofluid boiling and its use in heat transfer enhancement. This article covers recent advances in the last decade by researchers in both pool boiling and convective boiling applications, with nanofluids as the working fluid. The available data in the literature is reviewed in terms of enhancements, and degradations in the nucleate boiling heat transfer and critical heat flux. Conflicting data have been presented in the literature on the effect that nanofluids have on the boiling heat-transfer coefficient; however, almost all researchers have noted an enhancement in the critical heat flux during nanofluid boiling. Several researchers have observed nanoparticle deposition at the heater surface, which they have related back to the critical heat flux enhancement.

183 citations


Cites background from "Enhancing thermal conductivity of f..."

  • ...Further experimental investigations have reported that suspensions containing nanoparticles have substantially higher thermal conductivities than those of the base heat-transfer fluids [1-3]....

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  • ...Choi [1] first used the term ‘nanofluids’ in 1995, where he provided results of a theoretical study of suspended copper nanoparticles in a base fluid; he indicated abnormal improved thermal properties of the nanofluids....

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Journal ArticleDOI
TL;DR: In this paper, the HFE-7100 Engineered fluid with metal nanoparticles of spherical and non-spherical shapes with different sizes was used to investigate the effect of particle shape on Bejan number and entropy generation.
Abstract: The flow of mixed convection nanofluid over wedge under the effects of porous medium is investigated. The HFE-7100 Engineered Fluid having Nimonic 80a metal nanoparticles of spherical and non-spherical shapes with different sizes is used. The particle shape effects on Bejan number and entropy generation are taken into account. The system of partial differential equations is first written in terms of ordinary differential equations using adequate similarity transformations and then solved analytically. Analytical solutions of the resulting equations are obtained for the velocity and temperature profiles. Simultaneous effects of porous medium, particle volume friction, mixed convection parameter, and angle of wedge in the presence of different shapes nanoparticles are demonstrated graphically. Effects of particle concentrations, sizes on wall stress, heat transfer coefficient of Skin friction, and Nusselt are discussed in the form of tables.

183 citations


Cites background from "Enhancing thermal conductivity of f..."

  • ...The problem of heat transfer enhancement was first sorted out by Choi (1995) upon inventing ‘‘nanofluid’’ indicating engineered colloids composed of nanoparticles dispersed in a base fluid....

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Journal ArticleDOI
TL;DR: A review of the state-of-the-art nanofluid studies on such topics as thermo-physical properties, convective heat transfer performance, boiling heat transfer, and critical heat flux (CHF) enhancement can be found in this article.

183 citations

Journal ArticleDOI
TL;DR: In this article, the effects of two kinds of surfactants (SDS and polyvinylpyrrolidone) on the stability and thermal conductivity of Al 2 O 3 /de-ionized water nanofluids are analyzed respectively.

183 citations