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A numerical simulation for magnetohydrodynamic nanofluid flow and heat transfer in rotating horizontal annulus with thermal radiation

机译：磁性动力学纳米流体流动和热辐射旋转水平环空转传热的数值模拟

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摘要

The impact of an axial magnetic field on the heat transfer and nanofluid flow among two horizontal coaxial tubes in the presence of thermal radiation was considered in this study. The impact of viscous dissipation was also considered. The well-known KKL (Koo-Kleinsteuer-Li) model was applied to approximate the viscosity of the nanofluid and the effective thermal conductivity. Furthermore, proper transformations for the velocity and temperature were applied in this study to obtain a set of ODEs (ordinary differential equations) for basic equations governing the flow, heat and mass transfer. In addition, the 4th order Runge-Kutta (RK) numerical scheme was applied to solve the differential equations along with the associated boundary conditions. The impacts of different parameters, including Hartmann number, Reynolds number, radiation parameter and aspect ratio, on the heat transfer and flow features were studied. According to the results, the value of the Nusselt number increases with an increase in the radiation parameter, Hartmann number and aspect ratio and a decrease in the Reynolds number and Eckert number.
机译：轴向磁场对传热的热辐射的存在两个水平同轴管之间流动纳米流体的影响，并在此研究中考虑。粘性耗散的影响也被认为。众所周知KKL（辜Kleinsteuer-Li）的模型应用于近似纳米流体和有效导热率的粘度。此外，速度及温度适当变换在该研究中应用以获得用于管理的流动，传热和传质基本方程的一组常微分方程（常微分方程）。此外，4阶龙格 - 库塔（RK）数值格式应用于求解微分方程与相关联的边界条件一起。不同的参数，包括哈特曼数，雷诺数，辐射参数和纵横比，在传热和流动特征的影响进行了研究。根据研究结果，努塞尔数的值的增加所述辐射参数，哈特曼数和纵横比，并在雷诺数和埃克特数量的减少而增加。

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  • 来源
    《RSC Advances》 |2019年第39期|共13页
  • 作者

    Peng Yeping; Alsagri Ali Sulaiman; Afrand Masoud; Moradi R.;

  • 作者单位

    Shenzhen Univ Coll Mechatron &

    Control Engn Shenzhen Key Lab Electromagnet Control Shenzhen 518060 Peoples R China;

    Qassim Univ Coll Engn Unayzah Mech Engn Dept Buraydah Saudi Arabia;

    Ton Duc Thang Univ Adv Inst Mat Sci Lab Magnetism &

    Magnet Mat Ho Chi Minh City Vietnam;

    Khazar Univ Coll Engn &

    Appl Sci Fac Chem Engn Baku Azerbaijan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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