Rayleigh–Bénard convection of Al2O3/water nanofluids in a cavity considering sedimentation,thermophoresis, and Brownian motion |
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| Affiliation: | 1. Department of Mechanical Engineering, National Cheng-Kung University, Tainan 70101, Taiwan, ROC;2. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, ROC;3. Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran;1. Department of Mechanical Engineering, Technology Faculty, F?rat University, Elazig, Turkey;2. LGCGM EA3913, Equipe Matériaux et Thermo-Rhéologie, Université Rennes 1, IUT de Rennes, 3 rue du Clos Courtel, BP 90422, 35704 Rennes Cedex 7, France;3. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan, ROC;4. Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia;5. Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran |
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| Abstract: | This paper aims to investigate the Rayleigh–Bénard convection of Al2O3/water nanofluids in a cavity considering the sedimentation, thermophoresis, and Brownian motion. For this purpose, a numerical simulation is carried out using finite volume method to obtain the flow patterns and heat transfer characteristics of nanofluid flow inside the cavity. The results are presented for volume fractions up to 4%, Rayleigh numbers between 104 and 8 × 104 where the temperature difference between top and bottom walls is between 2 and 10 °C. To validate the numerical solution, comparisons are made between the numerical results and experimental data available in the literature. The comparisons unfold that the results of numerical work are in a good agreement with the previous experimental results. |
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