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A characteristic-based numerical simulation of water-titanium dioxide nano-fluid in closed domains

Adibi, T ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.5829/ije.2020.33.01a.18
  3. Publisher: Materials and Energy Research Center , 2020
  4. Abstract:
  5. A new characteristic-based method is developed and used for solving the mixed and forced convection problems. The nano-fluid flow with heat transfer is simulated with a novel characteristic-based scheme in closed domains with different aspect ratios. For this purpose, a FORTRAN code has been written and developed. Water as a pure fluid and water-titanium dioxide as a nano-fluid were considered. The governing equations are solved by the finite volume utilizing a characteristic-based scheme for the convective fluxes. The simulation is done at Grashof numbers from 100 to 104, Reynolds numbers from 100 to 1000, and volume fractions of nano-particles from 0% to 10%. Streamlines, isotherms, friction factor, and mean Nusselt number are obtained in various conditions. The convective behavior of nano-fluid is explored as a function of several parameters, such as Grashof number and geometrical parameters. Results indicate that the mean Nusselt number for the nanofluid is up to 23% more than that of pure water. © 2020 Materials and Energy Research Center. All rights reserved
  6. Keywords:
  7. Friction Factor ; Nano-fluid ; Numerical Method ; Nusselt Number ; Titanium Dioxide ; Aspect ratio ; Friction ; Geometry ; Grashof number ; Nanoparticles ; Numerical methods ; Oxides ; Reynolds number ; Characteristic-based method ; Characteristic-based schemes ; Convection problem ; Convective behavior ; Convective flux ; Friction factors ; Governing equations ; Nanofluids ; Flow of fluids
  8. Source: International Journal of Engineering, Transactions A: Basics ; Volume 33, Issue 1 , 2020 , Pages 158-163
  9. URL: https://www.sid.ir/en/journal/ViewPaper.aspx?ID=740959