ELECTROMAGNETOHYDRODYNAMIC FLOW AND HEAT TRANSFER OF NANOFLUID IN A PARALLEL PLATE MICROCHANNEL
ELECTROMAGNETOHYDRODYNAMIC FLOW AND HEAT TRANSFER OF NANOFLUID IN A PARALLEL PLATE MICROCHANNEL
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平行板微通道中纳米流体的电磁流体流动和传热
DOI：
10.1017/jmech.2016.57
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发表时间：
2017
影响因子：
1.7
通讯作者：
Li F. -Q.
中科院分区：
文献类型：
--
作者：
Zhao G. -P.;Jian Y. -J.;Li F. -Q.
研究了纳米流体在平行平板微通道内的电磁流体动力学（EMHD）流动与传热特性。纳米流体的驱动力来自于外加电场和垂直磁场的相互作用。分析中考虑了表面均匀通量的充分发展假设，并考虑了粘性耗散和焦耳热的影响。导出了速度和温度的解析解。此外，努塞尔数的变化进行了检查。结果表明，哈特曼数、无量纲参数S和纳米颗粒体积分数对纳米流体的流动和温度有显著影响。随着Hartmann数的增加，Nusselt数增加，并且随着纳米颗粒体积分数的增加，可以观察到类似的趋势。随着焦耳参数和Brinkman数的增加，传热性能降低，而随着纳米颗粒体积分数的增加，传热性能增强。
The present study is devoted to electromagnetohydrodynamic (EMHD) flow and heat transfer characteristics of nanofluid inside a parallel plate microchannel. The nanofluid is actuated by Lorentz force which is originated from the interaction of applied electrical field and perpendicular magnetic field. A fully developed assumption with uniform flux at the surface is considered in the analysis, and the influences of viscous dissipation as well as Joule heating are also taken into account. The analytical solutions for velocity and temperature are derived. Moreover, the Nusselt number variations are examined. The results show that the Hartmann number, the dimensionless parameter S and the nanoparticls volume fraction have significant influences on flow and temperature of nanofluid. As Hartmann number increasing, the Nusselt number improves and similar trend can be observed with the augment of nanoparticls volume fraction. A diminishment of heat transfer performance can be seen with increase of the Joule parameter and Brinkman number, while an enhancement in heat transfer can be witnessed with increase of nanoparticls volume fraction.