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Experimental study on rheological behavior of water–ethylene glycol mixture in the presence of functionalized multi-walled carbon nanotubes

A novel correlation for the non-Newtonian nanofluid

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Abstract

This paper examines the rheological behavior of water (60%vol.)–ethylene glycol (40%vol.) mixture in the presence of functionalized multi-walled carbon nanotubes. At the first, the viscosity of various samples was measured at shear rates ranging from 6.115 to 73.38 s−1 and temperature range of 25–50 °C. Then, using the experimental data, some correlations were proposed to predict the viscosity of the nanofluid. Viscosity measurements at different shear rates revealed that all nanofluid samples were non-Newtonian power law fluid. Findings showed that consistency index increased along with volume fraction, while it decreased with increasing temperature. Moreover, the values of power law index were always less than 1, indicating shear thinning behavior.

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Authors and Affiliations

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

    Ehsan Shahsavani, Masoud Afrand & Rasool Kalbasi

  2. Modern Manufacturing Technologies Research Center, Najafabad Branch, Islamic Azad University, Najafabad, Iran

    Ehsan Shahsavani, Masoud Afrand & Rasool Kalbasi

Authors
  1. Ehsan Shahsavani
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  2. Masoud Afrand
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  3. Rasool Kalbasi
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Correspondence to Masoud Afrand.

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Shahsavani, E., Afrand, M. & Kalbasi, R. Experimental study on rheological behavior of water–ethylene glycol mixture in the presence of functionalized multi-walled carbon nanotubes. J Therm Anal Calorim 131, 1177–1185 (2018). https://doi.org/10.1007/s10973-017-6711-8

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  • DOI: https://doi.org/10.1007/s10973-017-6711-8

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