中国物理B ›› 2013, Vol. 22 ›› Issue (7): 75202-075202.doi: 10.1088/1674-1056/22/7/075202

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Blockage effects on viscous fluid flow and heat transfer past a magnetic obstacle in a duct

张喜东, 黄护林   

  1. Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2012-10-11 修回日期:2012-12-24 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Supported by the National Natural Science Foundation of China (Grant No. 51176073), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20103218110027), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China.

Blockage effects on viscous fluid flow and heat transfer past a magnetic obstacle in a duct

Zhang Xi-Dong (张喜东), Huang Hu-Lin (黄护林)   

  1. Academy of Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2012-10-11 Revised:2012-12-24 Online:2013-06-01 Published:2013-06-01
  • Contact: Huang Hu-Lin E-mail:hlhuang@nuaa.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China (Grant No. 51176073), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20103218110027), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China.

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摘要： The effect of the lateral walls on the fluid flow and heat transfer is investigated when the fluid passes a magnetic obstacle in present paper. The blockage ratio β that represents the ratio between the width of external magnet My and the spanwise width Ly is employed to depict the effect. The finite volume method (FVM) based on the PISO algorithm is applied for the blockage ratios of 0.2, 0.3, and 0.4. The results show that, the value of Strouhal number St increases as the blockage ratio β increases, and for small β, the variation of St is very small when the interaction parameter and Reynolds number are increasing. Moreover, the cross-stream mixing induced by the magnetic obstacle can enhance the wall-heat transfer and the maximum value of the overall heat transfer increment is about 50.5%.

关键词: magnetic obstacle, blockage ratio, strouhal number, heat transfer

Abstract: The effect of the lateral walls on the fluid flow and heat transfer is investigated when the fluid passes a magnetic obstacle in present paper. The blockage ratio β that represents the ratio between the width of external magnet My and the spanwise width Ly is employed to depict the effect. The finite volume method (FVM) based on the PISO algorithm is applied for the blockage ratios of 0.2, 0.3, and 0.4. The results show that, the value of Strouhal number St increases as the blockage ratio β increases, and for small β, the variation of St is very small when the interaction parameter and Reynolds number are increasing. Moreover, the cross-stream mixing induced by the magnetic obstacle can enhance the wall-heat transfer and the maximum value of the overall heat transfer increment is about 50.5%.

Key words: magnetic obstacle, blockage ratio, strouhal number, heat transfer

中图分类号:  (Magnetohydrodynamics (including electron magnetohydrodynamics))

  • 52.30.Cv
44.27.+g (Forced convection) 47.32.cb (Vortex interactions)