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Turbulent forced convection heat transfer and thermophysical properties of Mgo–water nanofluid with consideration of different nanoparticles diameter, an empirical study

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Abstract

In the present paper results of an experimental study on thermal conductivity, dynamic viscosity and Nusselt number of turbulent forced convection of Magnesium Oxide–water nanofluid in a circular straight pipe is presented. The considered pertinent parameters are Reynolds number, nanoparticles volume fraction and nanoparticles diameter. The pure water and nanofluid with the nanoparticle volume fraction of 0.005, 0.01, 0.015, 0.02 and the nanoparticles diameter of 60, 50, 40 and 20 nm are considered. The experimental values of the thermal conductivity and the dynamic viscosity shows that traditional formulas underestimates these thermophysical parameters. Also the experimental results indicates that the existence of the nanoparticles in the pure water with all considered values of the nanoparticles volume fraction and diameter motivates the rate of heat transfer to increase. The nanofluids with higher volume fraction and smaller nanoparticles diameter results in higher Nusselt number.

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Acknowledgements

The authors would like to express their thanks for the assistance provided by the Nano-rheologic Laboratory of Semnan University Science and Technology Park for providing necessary instruments to carry out the sample preparation and helping in analyzing the samples to complete the article in time, and also express their deepest gratitude to Mr. Hafezi Molaei, Marofi and Makki for their supports.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Semnan University, Semnan, Iran

    Mohammad Hemmat Esfe & Seyfolah Saedodin

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  1. Mohammad Hemmat Esfe
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  2. Seyfolah Saedodin
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Correspondence to Mohammad Hemmat Esfe.

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Hemmat Esfe, M., Saedodin, S. Turbulent forced convection heat transfer and thermophysical properties of Mgo–water nanofluid with consideration of different nanoparticles diameter, an empirical study. J Therm Anal Calorim 119, 1205–1213 (2015). https://doi.org/10.1007/s10973-014-4197-1

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  • DOI: https://doi.org/10.1007/s10973-014-4197-1

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