Combined MHD convection and thermal radiation of nanofluid in a lid-driven porous enclosure with irregular thermal source on vertical sidewalls

被引:0
作者
S. Muthukumar
S. Sureshkumar
Ali J. Chamkha
M. Muthtamilselvan
Eswari Prem
机构
[1] K.S.Rangasamy College of Technology,Department of Mathematics
[2] Kongu Engineering College,Department of Mathematics
[3] Prince Mohammad Bin Fahd University,Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment
[4] American University of Ras Al Khaimah,RAK Research and Innovation Center
[5] Bharathiar University,Department of Mathematics
[6] Government Arts College for Men,P.G. and Research Department of Mathematics
来源
Journal of Thermal Analysis and Calorimetry | 2019年 / 138卷
关键词
MHD; Thermal radiation; Porous cavity; Sinusoidal heating; Nanofluid;
D O I
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中图分类号
学科分类号
摘要
Mixed convective heat transfer of Cu–water nanofluid in a porous cavity with non-uniform temperature profiles on vertical sidewalls in the presence of thermal radiation and magnetic field is examined numerically. The vertical sidewalls are heated sinusoidally. Thermally insulated walls are considered at the remaining sides of the cavity. The magnetic field is applied parallel to the horizontal walls uniformly. The SIMPLE algorithm based on finite volume approach is applied to solve the governing equations. The numerical outcomes are discussed in the wide range of the parameters, Richardson number, phase deviation, amplitude ratio, Darcy number, Hartmann number, the thermal radiation, and the solid volume fraction. It is found that the average Nusselt number is decreased in value with the raise in the either Hartmann number or Richardson number in the presence of thermal radiation. The average heat transfer rate is enhanced with an augment in the solid volume fraction, and this enhancement is more effective in the presence of thermal radiation than that of in the absence of thermal radiation. The highest heat transfer rate is obtained for φ=0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\varphi =0$$\end{document} in the forced convection regime, whereas it is maximum at φ=3π/4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\varphi =3\pi /4$$\end{document} in the mixed and free convection regimes.
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页码:583 / 596
页数:13
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