SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (2): 329-339.DOI: 10.1016/j.cjche.2019.04.024

• Fluid Dynamics and Transport Phenomena •     Next Articles

Hydrodynamic and heat transfer properties of magnetic fluid in porous medium considering nanoparticle shapes and magnetic field-dependent viscosity

Mohsen Izadi1, Masoud Javanahram2, Seyed Mohsen Hashem Zadeh3, Dengwei Jing4   

  1. 1 Mechanical Engineering Department, Lorestan University, Khorramabad, Iran;
    2 Mechanical Engineering Department, Islamic Azad University, Bushehr, Iran;
    3 Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Iran;
    4 School of Energy and Power Engineering, State Key Lab of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2019-02-25 Revised:2019-04-25 Online:2020-05-21 Published:2020-02-28
  • Contact: Mohsen Izadi, Dengwei Jing
  • Supported by:
    The authors gratefully acknowledge the financial supports of the National Natural Science Foundation of China (No. 51776165). This work was also supported by the China Fundamental Research Funds for the Central Universities.

Hydrodynamic and heat transfer properties of magnetic fluid in porous medium considering nanoparticle shapes and magnetic field-dependent viscosity

Mohsen Izadi1, Masoud Javanahram2, Seyed Mohsen Hashem Zadeh3, Dengwei Jing4   

  1. 1 Mechanical Engineering Department, Lorestan University, Khorramabad, Iran;
    2 Mechanical Engineering Department, Islamic Azad University, Bushehr, Iran;
    3 Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Iran;
    4 School of Energy and Power Engineering, State Key Lab of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • 通讯作者: Mohsen Izadi, Dengwei Jing
  • 基金资助:
    The authors gratefully acknowledge the financial supports of the National Natural Science Foundation of China (No. 51776165). This work was also supported by the China Fundamental Research Funds for the Central Universities.

Abstract: The purpose of this paper is to study the characteristics of the combined convection heat transfer and a micropolar nanofluid flow passing through an impermeable stretching sheet in a porous medium. The nanofluid flow field is affected by a magnetic field perpendicular to the sheet. The dynamic viscosity of the micropolar nanofluid changes under the influence of the magnetic field. The continuity, linear momentum, angular momentum, and energy equations are first simplified using the order of magnitude technique that, along with the applied boundary conditions and the definition of the appropriate parameters, are transferred to the similarity space using the similarity analysis. Then the resulting equations are solved using the Runge-Kutta method. The distinction of the macroscale and microscale flow fields and temperature fields resulting from different nanoparticle shapes was clarified. Increasing the Hartmann number, the vortex viscosity parameter, the magnetic parameter, the nanoparticle volume fraction, and the permeability parameter of the porous media increased the surface friction on the sheet. Increasing the vortex viscosity parameter, the magnetic parameter, and the volume fraction of the nanoparticles increases the Nusselt number.

Key words: MHD-combined convection, Porous media, Magnetic micropolar nanofluid

摘要: The purpose of this paper is to study the characteristics of the combined convection heat transfer and a micropolar nanofluid flow passing through an impermeable stretching sheet in a porous medium. The nanofluid flow field is affected by a magnetic field perpendicular to the sheet. The dynamic viscosity of the micropolar nanofluid changes under the influence of the magnetic field. The continuity, linear momentum, angular momentum, and energy equations are first simplified using the order of magnitude technique that, along with the applied boundary conditions and the definition of the appropriate parameters, are transferred to the similarity space using the similarity analysis. Then the resulting equations are solved using the Runge-Kutta method. The distinction of the macroscale and microscale flow fields and temperature fields resulting from different nanoparticle shapes was clarified. Increasing the Hartmann number, the vortex viscosity parameter, the magnetic parameter, the nanoparticle volume fraction, and the permeability parameter of the porous media increased the surface friction on the sheet. Increasing the vortex viscosity parameter, the magnetic parameter, and the volume fraction of the nanoparticles increases the Nusselt number.

关键词: MHD-combined convection, Porous media, Magnetic micropolar nanofluid