Magneto-hydrodynamic natural convection in an inclined T-shaped enclosure for different nanofluids and subjected to a uniform heat source

被引:78
作者
Hussein, Ahmed Kadhim [1 ]
Bakier, M. A. Y. [2 ]
Ben Hamida, Mohamed Bechir [3 ,4 ]
Sivasankaran, S. [5 ]
机构
[1] Babylon Univ, Dept Mech Engn, Coll Engn, Babylon City, Hilla, Iraq
[2] Assiut Univ, Fac Sci, Dept Math, Assiut, Egypt
[3] Univ Sousse, High Sch Sci & Technol Hammam Sousse ESSTHS, Dept Phys, Sousse, Tunisia
[4] Univ Monastir, Preparatory Inst Engn Studies Monastir IPEIM, Res Unit Ionized Backgrounds & Reagents Studies U, Monastir City, Tunisia
[5] Univ Malaya, Inst Math Sci, Kuala Lumpur 50603, Malaysia
关键词
Nanofluid; Natural convection; Magnetic field; T-shaped enclosure; Heat source; LATTICE BOLTZMANN SIMULATION; MAGNETIC-FIELD; POROUS-MEDIUM; NUMERICAL-SIMULATION; WATER NANOFLUID; CAVITY; FLOW; GENERATION;
D O I
10.1016/j.aej.2016.06.020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper examines numerically by using the finite difference method the laminar steady magneto-hydrodynamic natural convection in an inclined T-shaped enclosure filled with different types of nanofluids. A uniform heat source is embedded on a part of the upper wall of the enclosure. Both left and right sidewalls of the enclosure leg are maintained at a constant cold temperature, while the other portions of the enclosure walls are considered adiabatic. A magnetic field is applied vertically downward on the bottom wall of the enclosure. Based on the numerical results, the effects of the dominant parameters such as Rayleigh number, Hartmann number, inclination angle, solid volume fraction, location and length of the heat source and enclosure aspect ratio are examined. The numerical results are obtained for Hartmann number varying as 0 <= Ha <= 100, inclination angle varying as 0 <= Phi <= 90 degrees, Rayleigh numbers varying as 10(3) <= Ra <= 10(6), aspect ratio 0.3 <= AR <= 0.9, heat source length 0.2 <= B <= 0.8, heat source location 0.2 <= D <= 0.5 and the solid volume fractions varying as 0 <= phi <= 0.2. Comparison with previously published numerical work is performed and a good agreement between the results is observed. It is found that the mean Nusselt number increases with the increase of Rayleigh number, inclination angle, aspect ratio, heat source location and volume fraction of nanoparticles, while, it decreases when the Hartmann number and heat source length increase. (C) 2016 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V.
引用
收藏
页码:2157 / 2169
页数:13
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