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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.2014007211
pages 453-470

MIXED CONVECTION FLOW AND HEAT TRANSFER IN A LID-DRIVEN CAVITY SUBJECTED TO NANOFLUID: EFFECT OF TEMPERATURE, CONCENTRATION AND CAVITY INCLINATION ANGLES

Mohammad Hemmat Esfe
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Seyed Sadegh Mirtalebi Esforjani
Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Isfahan, Iran
Mohammad Akbari
Department of Mechanical Engineering, Semnan University, Semnan, Iran

ABSTRAKT

In this work, mixed convection in a lid-driven cavity with an inside heated obstacle at various cavity inclination angles with new formulation of variable properties was studied numerically. The bottom and vertical walls are kept insulated, whereas the top moving wall is maintained at a low temperature Tc. An obstacle of a relatively higher temperature Th is located on the bottom wall of the cavity. The governing equations are discretized using the finite volume method and SIMPLER algorithm. Using a developed code, we accomplished a parametric study and analyzed the influence of important parameters, such as the Richardson number, solid volume fraction of Al2O3 nanoparticles, cavity inclination angles, height of a hot obstacle, and the nanofluid temperature on the thermal behavior and flow characteristics.


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