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Effect of tiO_2 Nanoparticles on Heat and Drag Properties of Dilute Polymer Solutions

Paryani, Sadra | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 46775 (57)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Ramezani Saadat Abadi, Ahmad; Mohammadi, Mohammad Reza
  7. Abstract:
  8. In the present work, the experiments were carried out for two types of PAM (3330 and 3630) with three distinct concentrations (25, 40 and 55 ppm) and TiO_2-water nanofluid for four concentrations (1.5, 2, 2.5 and 3 vol. %), and the Nusselt number and friction factor for each of them expressed separately. The Reynolds number was in the range from 11000 to 21000. The steady state turbulent convective heat transfer and friction factor of the combination of TiO_2-water nanofluid and polymer 3330 in the coiled tube were investigated. The effects of the Reynolds number for 2 vol. % nanoparticles which consists of 25 ppm PAM (3330) determined at the constant temperature of 24°C. It was observed that the friction factor decreased with increasing Re number after threshold Re number. The Nusselt number can be increased with the augmentation of Reynolds number, but the optimum concentration from polymer and nanofluid should be applied. Furthermore, the trend is unknown and must be examined for specific Reynolds number, especially at high Re numbers. At Re = 21000, Nusselt number increased 5% and the friction factor decreased 8%
  9. Keywords:
  10. Polymers ; Nanofluid ; Drag Reduction ; Titanium Dioxide Nanoparticles ; Convection Heat Transfer ; Turbulent Flow ; Coiled Tube

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