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Heat Transfer Research
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ISSN Druckformat: 1064-2285
ISSN Online: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2017007503
pages 949-964

NUMERICAL INVESTIGATION OF MIXED CONVECTION OF SiO2-WATER NANOFLUIDS WITHIN AN INCLINED DOUBLE LIDS-DRIVEN CAVITY

J. Amani
Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran
Davood Semiromi Toghraie
Department of Mechanical Engineering, Khomeinishahr Branch, Islamic Azad University, Khomeinishahr, Iran
Arash Karimipour
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
A. Niroumand
Department of Mechanical Engineering, University of Kashan, Kashan, Iran
M. R. Faridzadeh
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

ABSTRAKT

To investigate mixed convection flows through nanofluid in a square double lid-driven cavity with various inclination angles, a numerical method based on the finite volume approach was applied. In this study, a SiO2-water nanofluid was used. The cavity was nonuniformly heated from the left, Th, and cooled from the opposite wall. The top and the bottom moving walls were insulated. The study was conducted for the Richardson number 0.1 to 10, Reynolds number 1 to 100, with solid volume fractions (φ) of nanoparticles being altered from 0 to 0.06. The Patel and Brinkman models were used for calculating thermal conductivity and effective viscosity of the nanofluid, respectively. The impact of Reynolds number, Richardson number, inclination of cavity, and of solid volume fraction of the nanofluid on the hydrodynamic and thermal characteristics were studied and discussed. As a result, it was found that the heat transfer rate increases with solid volume fraction.


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