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      Slip-Flow and Heat Transfer of a Non-Newtonian Nanofluid in a Microtube

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      PLoS ONE
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          Abstract

          The slip-flow and heat transfer of a non-Newtonian nanofluid in a microtube is theoretically studied. The power-law rheology is adopted to describe the non-Newtonian characteristics of the flow, in which the fluid consistency coefficient and the flow behavior index depend on the nanoparticle volume fraction. The velocity profile, volumetric flow rate and local Nusselt number are calculated for different values of nanoparticle volume fraction and slip length. The results show that the influence of nanoparticle volume fraction on the flow of the nanofluid depends on the pressure gradient, which is quite different from that of the Newtonian nanofluid. Increase of the nanoparticle volume fraction has the effect to impede the flow at a small pressure gradient, but it changes to facilitate the flow when the pressure gradient is large enough. This remarkable phenomenon is observed when the tube radius shrinks to micrometer scale. On the other hand, we find that increase of the slip length always results in larger flow rate of the nanofluid. Furthermore, the heat transfer rate of the nanofluid in the microtube can be enhanced due to the non-Newtonian rheology and slip boundary effects. The thermally fully developed heat transfer rate under constant wall temperature and constant heat flux boundary conditions is also compared.

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          Most cited references28

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          HYDRODYNAMIC AND HEAT TRANSFER STUDY OF DISPERSED FLUIDS WITH SUBMICRON METALLIC OXIDE PARTICLES

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            Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids

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              • Record: found
              • Abstract: not found
              • Article: not found

              Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles

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                Author and article information

                Contributors
                Role: Editor
                Journal
                PLoS One
                PLoS ONE
                plos
                plosone
                PLoS ONE
                Public Library of Science (San Francisco, USA )
                1932-6203
                2012
                15 May 2012
                : 7
                : 5
                : e37274
                Affiliations
                [1]State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, China
                Massachusetts Institute of Technology, United States of America
                Author notes

                Analyzed the data: JN CF WT. Wrote the paper: JN CF WT. Conducted the theoretical derivation: JN WT. Designed and performed the numerical calculation: JN CF.

                Article
                PONE-D-11-25592
                10.1371/journal.pone.0037274
                3352882
                22615961
                fbc6666a-1c5b-4931-8bed-b5312160d1b7
                Niu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
                History
                : 13 December 2011
                : 17 April 2012
                Page count
                Pages: 9
                Categories
                Research Article
                Engineering
                Aerospace Engineering
                Fluid Mechanics
                Chemical Engineering
                Fluid Mechanics
                Mechanical Engineering
                Fluid Mechanics
                Transportation
                Materials Science
                Material by Attribute
                Nanomaterials
                Nanotechnology
                Nanomaterials

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