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Nanoscience and Technology: An International Journal

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ISSN Imprimer: 2572-4258

ISSN En ligne: 2572-4266

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COMPUTATION OF GOLD-WATER NANOFLUID NATURAL CONVECTION IN A THREE-DIMENSIONAL TILTED PRISMATIC SOLAR ENCLOSURE WITH ASPECT RATIO AND VOLUME FRACTION EFFECTS

Volume 11, Numéro 2, 2020, pp. 141-167
DOI: 10.1615/NanoSciTechnolIntJ.2020031257
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RÉSUMÉ

Nanofluids are increasingly being deployed in numerous energy applications owing to their impressive thermal enhancement properties. Motivated by these developments in the current study we present finite volume numerical simulations of natural convection in an inclined three-dimensional prismatic direct absorber solar collector (DASC) containing gold-water nanofluid. Steady-state, incompressible laminar Newtonian viscous flow is assumed. The enclosure has two adiabatic walls, one hot (solar receiving) and one colder wall. ANSYS FLUENT software (version 19.1) is employed. The Tiwari-Das volume fraction nanofluid model is utilized to simulate nanoscale effects and allows a systematic exploration of volume fraction effects. The effects of thermal buoyancy (Rayleigh number), geometric aspect ratio, and enclosure tilt angle on isotherm and temperature contour distributions are presented with extensive visualization in three dimensions. Grid-independence tests are included. Validation with published studies from the literature is also conducted. A significant modification in vortex structure and temperature distribution is computed with volume fraction, Rayleigh number, aspect ratio, and tilt angle. Heat flux and average Nusselt number results are also included. Gold nanoparticles even at relatively low volume fractions are observed to achieve substantial improvement in heat transfer characteristics.

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CITÉ PAR
  1. Garvandha Mahesh, Narla V. K., Tripathi Dharmendra, Anwar Bég O., Modelling the Impact of Melting and Nonlinear Radiation on Reactive Buongiorno Nanofluid Boundary Layer Flow from an Inclined Stretching Cylinder with Cross-diffusion and Curvature Effects, in Energy Systems and Nanotechnology, 2021. Crossref

  2. Bhatti Muhammad Mubashir, Bég Osman Anwar, Abdelsalam Sara I., Computational Framework of Magnetized MgO–Ni/Water-Based Stagnation Nanoflow Past an Elastic Stretching Surface: Application in Solar Energy Coatings, Nanomaterials, 12, 7, 2022. Crossref

  3. Prakash J. , Tripathi Dharmendra, Beg Osman Anwar, Srivastava Vineet , EMHD CASSON HYBRID NANOFLUID FLOW OVER AN EXPONENTIALLY ACCELERATED ROTATING POROUS SURFACE , Journal of Porous Media, 25, 11, 2022. Crossref

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