Browse > Article
http://dx.doi.org/10.3795/KSME-B.2017.41.10.659

Numerical Study of Thermo-Fluid Features of Electrically Conducting Fluids in Tube Bank Heat Exchangers Exposed to Uniform Magnetic Fields  

Oh, Jin Ho (Dept. of Mechanical Engineering, Kyungpook Nat'l Univ.)
Kang, Namcheol (School of Mechanical Engineering, Kyungpook Nat'l Univ.)
Park, Il Seouk (School of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.41, no.10, 2017 , pp. 659-665 More about this Journal
Abstract
When an electrically conducting fluid flows through a staggered tube bank, the heat transfer and fluid flow features are changed by the externally introduced magnetic field. This study provides a numerical investigation of this phenomenon. Heat and fluid flows are investigated for unsteady laminar flows at Reynolds numbers of 50 and 100 with the Hartmann number gradually increasing from zero to 100. As the Hartmann number increases, and owing to the effects of the introduced magnetic field, the velocity boundary layer near the tube wall is thinned, the flow separation is delayed downstream, and the shrinkage of a recirculation zone formed near the rear side is observed. Based on these thermo-fluid deformations, the resulting changes in the local and average Nusselt number are investigated.
Keywords
Tube Bank Heat Exchanger; Magnetohydrodynamics; Hartmann Layer; Heat Transfer;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Zukauskas, A., 1972, "Heat Transfer from Tubes in Crossflow," Advances in heat transfer, Vol. 8, pp. 93-160.
2 Fujii, M., Fujii, T. and Nagata, T., 1984, "A Numerical Analysis of Laminar Flow and Heat Transfer of Air in an In-line Tube Bank," Numerical Heat Transfer, Vol. 7, No. 1, pp. 89-102.
3 Jang, J.-Y., Wu, M.-C. and Chang, W.-J., 1996, "Numerical and Experimental Studies of Three Dimensional Plate-fin and Tube Heat Exchangers," International Journal of Heat and Mass Transfer, Vol. 39, No. 14, pp. 3057-3066.   DOI
4 Khan, W. A., Culham, J. R. and Yovanovich, M. M. 2006, "Convection Heat Transfer from Tube Banks in Crossflow: Analytical approach," International journal of heat and mass transfer, Vol. 49, No. 25, pp. 4831-4838.   DOI
5 Ha, M. Y., Lee, H. G. and Seong, S. H., 2003, "Numerical Simulation of Three-dimensional Flow, Heat Transfer, and Solidification of Steel in Continuous Casting Mold with Electromagnetic Brake," Journal of Materials Processing Technology, Vol. 133, No. 3, pp. 322-339.   DOI
6 Idogawa, A., et al., 1993, "Control of Molten Steel Flow in Continuous Casting Mold by Two Static Magnetic Fields Imposed on Whole Width," Materials Science and Engineering, Vol. 173, No. 1-2, pp. 293-297.   DOI
7 Hoshikawa, K., 1982, "Czochralski Silicon Crystal Growth in the Vertical Magnetic Field," Japanese Journal of Applied Physics, Vol. 21, No. 9, L54.   DOI
8 Hashizume, H., 2006, "Numerical and Experimental Research to Solve MHD Problem in Liquid Blanket System," Fusion Engineering and Design, Vol. 81, No. 8, pp. 1431-1438.   DOI
9 Smolentsev, S., et al., 2006, "Numerical Analysis of MHD Flow and Heat Transfer in a Poloidal Channel of the DCLL Blanket with a SiC f/SiC Flow Channel Insert," Fusion Engineering and Design, Vol. 81, No. 1, pp. 549-553.   DOI
10 P. A. Davidson., An introduction to magnetohydrodynamics, Cambridge university press, New York.
11 Patankar, Suhas V., Numerical heat transfer and fluid flow, Taylor & Francis, New York.
12 Shercliff, J. A., 1953, "Steady Motion of Conducting Fluids in Pipes under Transverse Magnetic Fields," Mathematical Proceedings of the Cambridge Philosophical Society, Vol. 49, No. 1, pp. 136-144.