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Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids

Finding a critical temperature

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Abstract

A series of experiments have been carried out to determine the thermal conductivity and viscosity of a novel nanofluid, i.e., Mg(OH)2/ethylene glycol (EG). The thermal conductivity and viscosity of nanofluids with volume fractions by 2 % in the temperature range of 25–55 °C are measured. The results unfold that in the temperature of 35 °C, called critical temperature, the ratio of nanofluid viscosity to water viscosity is minimized. This critical temperature reveals that it is more advantageous to use Mg(OH)2/EG nanofluids instead of water at temperatures higher than 35 °C from the pressure drop and pumping power viewpoint.

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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. Molaei, Makki, and Hafezi for their supports.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Semnan University, P.O. Box 35131-19111, Semnan, Iran

    Seyfolah Saedodin

  2. Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran

    Amin Asadi

  3. Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran

    Mohammad Hemmat Esfe & Arash Karimipour

Authors
  1. Mohammad Hemmat Esfe
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  2. Seyfolah Saedodin
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  3. Amin Asadi
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  4. Arash Karimipour
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Correspondence to Mohammad Hemmat Esfe.

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Hemmat Esfe, M., Saedodin, S., Asadi, A. et al. Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids. J Therm Anal Calorim 120, 1145–1149 (2015). https://doi.org/10.1007/s10973-015-4417-3

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  • DOI: https://doi.org/10.1007/s10973-015-4417-3

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