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首页> 外文期刊>International Journal of Heat and Mass Transfer >Irreversibility analysis of a vertical annulus using TiO_2/water nanofluid with MHD flow effects
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Irreversibility analysis of a vertical annulus using TiO_2/water nanofluid with MHD flow effects

机译：具有MHD流动效应的TiO_2 /水纳米流体对垂直环的不可逆性分析

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摘要

In this paper, an analytical study of the second law of thermodynamics is performed for the flow and heat transfer of TiO_2/water nanofluid in a vertical annulus with isoflux walls and under the influence of mag-netohydrodynamic (MHD) field. The governing equations in cylindrical coordinates are written and then simplified with reasonable assumptions. The simplified equations are solved analytically to obtain expressions for the velocity, temperature, and entropy generation distributions. The results are presented for different values of nanofluid volume fractions ø(0%≤ø≤ 2%), Hartmann number M and the flow parameter Gr/Re. To calculate the thermal conductivity and viscosity of TiO_2/water nanofluid, relations based on experimental data are used. Finally, using the well-known theoretical models for the thermal conductivity and viscosity, the effects of Hartmann number on the results are investigated.
机译：在本文中，对具有等通量壁的垂直环空中的TiO_2 /水纳米流体的流动和传热进行了热力学第二定律的分析研究，并受到了磁流体动力学（MHD）场的影响。编写圆柱坐标系中的控制方程，然后通过合理的假设进行简化。对简化的方程进行解析求解，以获得速度，温度和熵生成分布的表达式。给出了纳米流体体积分数ø（0％≤ø≤2％），Hartmann数M和流动参数Gr / Re的不同值的结果。为了计算TiO 2 /水纳米流体的热导率和粘度，使用基于实验数据的关系。最后，使用众所周知的热导率和粘度理论模型，研究了哈特曼数对结果的影响。

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  • 作者

    Omid Mahian; loan Pop; Ahmet Z. Sahin; Hakan F. Oztop; Somchai Wongwises;

  • 作者单位

    Young Researchers Club and elites, Mashhad Branch, Islamic Azad University, Mashhad, Iran;

    Department of Mathematics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania;

    Mechanical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia;

    Department of Mechanical Engineering, Technology Faculty, Firat University, Elazig, Turkey;

    Fluid Mechanics, Thermal Engineering and Multiphase Flow Research Lab (FUTURE), Department of Mechanical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanofluid; Entropy generation; Vertical annulus; MHD flow; Analytical solution;

    机译：纳米流体熵产生;垂直环;MHD流量;分析溶液;

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