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Analysis of nanofluid heat transfer in parallel-plate vertical channels partially filled with porous medium

Hajipour, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijthermalsci.2011.12.018
  3. Abstract:
  4. In this article, mixed-convective heat transfer of nanofluids in a vertical channel partially filled with highly porous medium was studied. In the porous region, the Brinkman-Forchheimer extended Darcy model was used to describe the fluid flow pattern. Different viscous dissipation models were also applied to account for viscous heating. At the porous medium-fluid interface, interfacial coupling conditions for the fluid velocity and temperature were used to derive the analytical solution using a two-parameter perturbation method. The model used for the nanofluids incorporates the effects of Brownian motion and thermophoresis. With constant wall temperature, velocity and temperature profiles and expressions for the Nusselt number values were obtained for fully-developed fluid flow. In addition, a numerical analysis was conducted using finite-difference method to compare the obtained results. Finally, a parametric study was conducted to investigate the influences of various parameters on the fluid flow pattern and heat-transfer performance. The predicted results clearly indicate that the presence of nanoparticles in the base fluid enhances the heat-transfer process significantly
  5. Keywords:
  6. Mixed convection ; Nanofluid ; Perturbation method ; Porous media ; Viscous dissipation ; Analytical solutions ; Constant wall temperature ; Darcy model ; Fluid velocities ; Interfacial couplings ; Nano-fluid ; Nanofluids ; Parallel plates ; Parametric study ; Porous medium ; Temperature profiles ; Vertical channels ; Viscous heating ; Brownian movement ; Flow patterns ; Forced convection ; Numerical analysis ; Nusselt number ; Porous materials ; Viscous flow ; Nanofluidics
  7. Source: International Journal of Thermal Sciences ; Volume 55 , 2012 , Pages 103-113 ; 12900729 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S129007291200004X