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Recovery of drop in heat transfer rate for a rotating system by nanofluids

Zeibi Shirejini, S. R ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.molliq.2016.05.039
  3. Publisher: Elsevier
  4. Abstract:
  5. This paper simulates Al2O3-water nanofluid flow and forced convection around a rotating circular cylinder. The governing parameters are Reynolds number (1 ≤ Re ≤ 100), solid volume fraction of nanoparticles (0 ≤ φ ≤ 0.05) and non-dimensional rotation rate (0 ≤ α ≤ 3). The simulations are performed to study the effects of mentioned parameters on the heat transfer rate and fluid flow characteristics. The governing equations including the continuity, momentum, and energy equations are solved with a finite volume method. It is observed that the reduction of heat transfer with increase in rotation rate is in the vicinity of 6.9% and 32% for Re = 5 and 100, respectively at φ = 0.05. Furthermore, the augmentation of the heat transfer rate by adding the nanoparticles to the base fluid, water, is in the vicinity of 10.3% at Re = 100, φ = 0.05 and α = 3
  6. Keywords:
  7. Al2O3-water nanofluid ; Aluminum ; Circular cylinders ; Cylinders (shapes) ; Finite volume method ; Flow of fluids ; Forced convection ; Heat transfer ; Nanoparticles ; Reynolds number ; Governing equations ; Governing parameters ; Heat transfer rate ; Nanofluids ; Rotating circular cylinders ; Rotation rate ; Solid volume fraction ; Thermal Performance ; Nanofluidics
  8. Source: Journal of Molecular Liquids ; Volume 220 , 2016 , Pages 961-969 ; 01677322 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0167732215313441