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Thermodynamic behaviors of magnetic-fluid in a thin channel with magnetic field and aspect ratio

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Abstract

The objective of this study is to numerically investigate the thermodynamic behaviors of a magnetic fluid with nano-sized magnetic particles in a thin channel. The numerical model developed using the FEM (finite element method) technique with mesh sensitivity analysis was validated with existing data and thermodynamic characteristics such as isotherms, streamlines and Nusselt numbers of the magnetic fluid were analyzed with variations of the composition of magnetite, the aspect ratio, the magnetic field intensity and the inclination angle of the channel. The numerical analysis showed the increase in the magnetic volume force in the thin channel with increasing magnetic field intensity and magnetic fluid viscosity. Under all magnetic field intensities, the mean Nusselt numbers of the magnetic fluid in the thin channel at the inclination angle of 45° were on average 77.9% higher than those at the inclination angle of 15° due to the increased convective heat transfer in the thin channel.

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Authors and Affiliations

  1. Green Car Power System R&D Division, Korea Automotive Technology Institute, Chonan, 330-912, South Korea

    Sung-Chul Kim

  2. Department of Mechanical Engineering, Dong-A University, Busan, 604-714, South Korea

    Jae-Hyeong Seo & Moo-Yeon Lee

  3. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea

    Dong-Yeon Lee

  4. School of Mechanical system Engineering, Chonbuk National University, Jeonju, 561-756, South Korea

    Dong-Pyo Hong

  5. Department of Electrical Engineering, Dong-A University, Busan, 604-714, South Korea

    Suk-Ju Kang

Authors
  1. Sung-Chul Kim
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  2. Jae-Hyeong Seo
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  3. Dong-Yeon Lee
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Correspondence to Moo-Yeon Lee.

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Kim, SC., Seo, JH., Lee, DY. et al. Thermodynamic behaviors of magnetic-fluid in a thin channel with magnetic field and aspect ratio. Int. J. Precis. Eng. Manuf. 15, 1377–1382 (2014). https://doi.org/10.1007/s12541-014-0479-6

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  • DOI: https://doi.org/10.1007/s12541-014-0479-6

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