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首页> 外文期刊>Computational thermal sciences >MHD TRANSIENT NANOFLUID FLOW AND HEAT TRANSFER FROM A MOVING VERTICAL CYLINDER WITH TEMPERATURE OSCILLATION
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MHD TRANSIENT NANOFLUID FLOW AND HEAT TRANSFER FROM A MOVING VERTICAL CYLINDER WITH TEMPERATURE OSCILLATION

机译：运动垂直汽缸的MHD瞬态纳米流体流动和传热

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摘要

In the present study, the effects of magnetohydrodynamics (MHD) on the transient free convection flow of a viscous, electrically conducting, and incompressible nanofluid past a moving semi-infinite vertical cylinder with temperature oscillation is studied. The fluid is water-based nanofluid containing nanoparticles of copper (Cu) with a nanoparticle volume fraction range less than or equal to 0.04. The Tiwari-Das nanofluid model [Int. J. Heat Mass Transf, 50(9-10):2002-2018 (2007)] is employed. The dimensionless governing partial differential equations are solved by using a robust, well-tested, implicit finite difference method of Crank-Nicolson type. The obtained results are benchmarked with previously published work for special cases of the problem in order to access the accuracy of the numerical method and found to be in excellent agreement. In particular, the effect of significant parameters, such as magnetic parameter, phase angle, nanoparticle volume fraction, and thermal Grashof number, on the flow and heat transfer characteristics is discussed. The present simulations are relevant to magnetic nanomaterial thermal flow processing in the chemical engineering and metallurgy industries.
机译：在本研究中，研究了磁流体动力学（MHD）对粘性，导电和不可压缩的纳米流体通过具有温度振荡的移动半无限垂直圆柱体的瞬态自由对流的影响。流体是水基纳米流体，包含纳米级体积分数范围小于或等于0.04的铜（Cu）纳米级颗粒。 Tiwari-Das纳米流体模型[Int。 J.Heat Mass Transf，50（9-10）：2002-2018（2007）]。通过使用健壮的，经过充分测试的隐式有限差分Crank-Nicolson型方法，可以解决无量纲控制的偏微分方程。为了获得数值方法的准确性，可以使用以前发表的针对特殊问题的工作对所得结果进行基准测试，发现结果非常一致。特别是，讨论了重要参数（例如磁参数，相角，纳米颗粒体积分数和热格拉索夫数）对流动和传热特性的影响。本模拟与化学工程和冶金行业中的磁性纳米材料热流处理有关。

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