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Thermal conductivity, viscosity, and electrical conductivity of iron oxide with a cloud fractal structure

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Abstract

In the present study, nanoscale iron oxide was synthesized using a hydrothermal method; XRD analysis revealed that all the produced crystals are iron oxide. FESEM microscopic imaging showed that particles are on the scale of nano and their morphology is cloud fractal. To study the laboratory properties of thermal conductivity, viscosity, and electrical conductivity of the nanoparticles, they were dispersed in ethylene glycol-based fluid and the nanofluid was in a two-step synthesis during this process. The experiments were carried out with a weight fraction between 0 and 2 % at temperatures between 25 and 45 °C. According to the results of the experiments, increasing the density of nanoparticles in the fluid increases thermal conductivity, as it was predicted in all theoretical models. On the other hand, nano viscosity increases as the weight fraction increases while it decreases as temperature goes up. Electrical conductivity also increases with raising the temperature and weight fraction. Theoretical models were studied to predict Thermal conductivity, viscosity, and electrical conductivity of the nanofluid.

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Authors and Affiliations

  1. Faculty of Engineering, Islamic Azad University, Tehran North Branch, Tehran, Iran

    Pouya Jamilpanah

  2. Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran

    Hassan Pahlavanzadeh

  3. Faculty of Chemical Engineering, Sharif University of Technology, Tehran, Iran

    Amanj Kheradmand

Authors
  1. Pouya Jamilpanah
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  2. Hassan Pahlavanzadeh
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  3. Amanj Kheradmand
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Correspondence to Hassan Pahlavanzadeh.

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Jamilpanah, P., Pahlavanzadeh, H. & Kheradmand, A. Thermal conductivity, viscosity, and electrical conductivity of iron oxide with a cloud fractal structure. Heat Mass Transfer 53, 1343–1354 (2017). https://doi.org/10.1007/s00231-016-1891-5

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  • DOI: https://doi.org/10.1007/s00231-016-1891-5

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