Thermal Conductivity of Water Based Nanofluids Containing Decorated Multi Walled Carbon Nanotubes with Different Amount of TiO2 Nanoparticles

Authors

  • A. Youssef Par-e-Tavous Research Institute, Mashhad, Iran
  • M. S. Ekrami-Kakhki Esfarayen University of Technology, Esfarayen, North Khorasan, Iran
  • S. Abbasi 1- Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Azadi Square, Mashhad, Iran 2- Esfarayen University of Technology, Esfarayen, North Khorasan, Iran
  • S. H. NoieBaghban Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Azadi Square, Mashhad, Iran
  • S. M. Zebarjad Department of Material Science and Engineering, Faculty of Engineering, Shiraz University, Shiraz, Iran
Abstract:

In this paper, we report for the first time, thermal conductivity behavior of nanofluids containing decorated MWCNTs with different amount of TiO2 nanoparticles. TEM image confirmed that the outer surface of MWCNTs successfully decorated with TiO2 nanoparticles. The results of thermal conductivity behavior of nanofluids revealed that the thermal conductivity and enhancement ratio of thermal conductivity of MWCNTsTiO2 at different amount of TiO2 nanoparticles are higher than those of TiO2 and MWCNTs nanofluids. Temperature and weight fraction dependence study also shows that the thermal conductivity of all nanofluids increases with temperature and weight fraction. However, the influence of temperature is more significant than that of weight fraction. We also found that decreasing amount ofTiO2 nanoparticles which introduce the outer surface of MWCNTs leads to the augmentation of thermal conductivity of nanofluids containing MWCNTs-TiO2.

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Journal title

volume 12  issue 1

pages  30- 40

publication date 2015-01-01

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