Entropy generation of nanofluid in presence of magnetic field using Lattice Boltzmann Method
Entropy generation of nanofluid in presence of magnetic field using Lattice Boltzmann Method
复制标题
DOI：
10.1016/j.physa.2014.09.053
复制
发表时间：
2015
影响因子：
3.3
通讯作者：
M. Sheikholeslami;D. Ganji
中科院分区：
文献类型：
--
作者：
M. Sheikholeslami;D. Ganji
本文采用格子Boltzmann方法（LBM）数值模拟了带有矩形加热体的方形封闭空间内CuO-水纳米流体的磁流体动力学自由对流流动。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。研究了相关参数如哈特曼数、纳米颗粒体积分数和瑞利数对流动、传热和熵产的影响。结果表明，随着Rayleigh数和纳米颗粒体积分数的增加，传热速率和无量纲熵产数增加，而随着Hartmann数的增加，传热速率和无量纲熵产数减小。
In this paper magnetohydrodynamic free convection flow of CuO–water nanofluid in a square enclosure with a rectangular heated body is investigated numerically using Lattice Boltzmann Method (LBM) scheme. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL (Koo–Kleinstreuer–Li) correlation. The influence of pertinent parameters such as Hartmann number, nanoparticle volume fraction and Rayleigh number on the flow, heat transfer and entropy generation have been examined. The results show that the heat transfer rate and Dimensionless entropy generation number increase with increase of the Rayleigh number and nanoparticle volume fraction but it decreases with increase of the Hartmann number.