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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TL;DR: In this paper, the authors presented both effective analytic and numerical solutions to MHD flow and heat transfer past a permeable stretching/shrinking sheet in a hybrid nanofluid with suction/injection and convective boundary conditions.
Abstract: The purpose of this study is to present both effective analytic and numerical solutions to MHD flow and heat transfer past a permeable stretching/shrinking sheet in a hybrid nanofluid with suction/injection and convective boundary conditions. Water (base fluid) nanoparticles of alumina and copper were considered as a hybrid nanofluid.,Proper-similarity variables were applied to transform the system of partial differential equations into a system of ordinary (similarity) differential equations. Exact analytical solutions were then presented for the dimensionless stream and temperature functions. Further, the authors introduce a very nice analytic and numerical solutions for both small and large values of the magnetic parameter.,It was found that no/unique/two equal/dual physical solutions exist for the investigated boundary value problem. The physically realizable practice of these solutions depends on the range of the governing parameters. For a stretching/shrinking sheet, it was deduced that a hybrid nanofluid works as a cooler on increasing some of the investigated parameters. Moreover, in the case of a shrinking sheet, the first solutions of hybrid nanofluid are stable and physically realizable rather than the nanofluid, while those of the second solutions are not for both hybrid nanofluid and nanofluid.,The present results for the hybrid nanofluids are new and original, as they successfully extend (generalize) the problems previously considered by different authors for the case of nanofluids.
105 citations
TL;DR: In this paper, a single pass counter flow chevron corrugated-plates plate heat exchanger considering nanofluids (CeO 2 and Al 2 O 3 ) as homogeneous mixtures has been presented.
105 citations
TL;DR: In this paper, the authors focused on the numerical modeling of steady laminar natural convection flow in an annulus filled with water-alumina nanofluid, where the inner surface of the annulus is heated uniformly by a uniform heat flux q and the outer boundary is kept at a constant temperature T c.
105 citations
Cites methods from "Enhancing thermal conductivity of f..."
...References [1] U.S. Choi, Enhancing thermal conductivity of fluids with nanoparticles. in: D.A. Siginer, H.P. Wang, (Eds.)...
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...[13] C.H. Chon, K.D. Kihm, S.P. Lee, S.U.S. Choi, Empirical correlation finding the role of temperature and particle size for nanofluid (Al2O3) thermal conductivity enhancement, Appl....
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...An innovative technique for improvement of heat transfer using nano-scale particles dispersed in a base fluid, known as nanofluid according to Choi [1], has been studied extensively in recent years for by Daungthongsuk and Wongwises [2], Trisaksri and Wongwises [3] mainly for forced convection applications....
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TL;DR: In this paper, an experimental study has been carried out on water-based SiO 2 and ZnO nanofluids flowing inside a horizontal tube whose wall temperature is imposed.
105 citations
TL;DR: In this article, the authors considered the Marangoni transport of dissipating SWCNT and MWCNT nanofluids under the influence of magnetic force and radiation, and derived numerical solutions of the arising nonlinear problem via Runge-Kutta based shooting approach.
Abstract: Present study addresses the Marangoni transport of dissipating SWCNT and MWCNT nanofluids under the influence of magnetic force and radiation. A novel exponential space dependent heat source is considered. The flow is generated due to a disk with surface tension created by thermal gradient. The partial differential equations system governing the flow of carbon-water nanoliquids and heat transfer through Marangoni convection is established. Subsequent system is reduced to nonlinear ordinary boundary value problem via generalized Karman transformations. Numerical solutions are developed of the arising nonlinear problem via Runge-Kutta based shooting approach. Impacts of embedded parameters are focused on Nusselt number , velocity and heat transport distributions through graphical illustrations. Our simulations figured out that the heat transfer rate increased via Marangoni convection; however it is decayed by applied magnetic force. The temperature of SWCNT-H 2O nanoliquid dominates MWCNT-H2O nanoliquid.
105 citations