Investigation of Nanofluid Flow and Heat Transfer in Presence of Magnetic Field Using KKL Model
Investigation of Nanofluid Flow and Heat Transfer in Presence of Magnetic Field Using KKL Model
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DOI：
10.1007/s13369-014-1060-4
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发表时间：
2014-04
影响因子：
2.9
通讯作者：
M. Sheikholeslami;M. Gorji-Bandpy;D. Ganji
中科院分区：
文献类型：
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作者：
M. Sheikholeslami;M. Gorji-Bandpy;D. Ganji
本文采用格子Boltzmann方法对磁场作用下纳米流体在曲边方腔内的流动与换热进行了数值研究。外壳中的基液是含有Al 2 O 3的水。利用KKL（Koo-Kleinstreuer-Li）关联式计算了纳米流体的有效导热系数和粘度。该模型考虑了布朗运动对有效导热系数的影响。与其他数值方法相比，这种调查被发现是在良好的协议。研究了纳米颗粒的体积分数、瑞利数和哈特曼数对流动和传热的影响。结果表明，除Ra = 104外，随着Hartmann数的增加，强化换热效果增强，其中Ha = 40是一个临界Hartmann数。
In this paper, flow and heat transfer of a nanofluid in a square cavity with curve boundaries in presence of magnetic field is investigated numerically using lattice Boltzmann method. The base fluid in the enclosure is water containing Al2O3. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL (Koo–Kleinstreuer–Li) correlation. In this model effect of Brownian motion on the effective thermal conductivity is considered. This investigation when compared with other numerical methods was found to be in excellent agreement. The influence of the nanoparticle volume fraction, Rayleigh number and Hartmann number on flow and heat transfer is investigated. The results show that enhancement in heat transfer increases with increase of Hartmann number except forRa= 104in whichHa= 40 roles as a critical Hartmann number.