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TECHNICAL PAPERS: Porous Media, Particles, and Droplets

The Effect of Magnetic Field on Local Heat Transfer Coefficient in Fluidized Beds With Immersed Heating Surface

[+] Author and Article Information
Z. Al-Qodah

Department of Chemical Engineering, Amman College for Engineering Technology, Al-Balqa’ Applied University, P.O. Box 340558, Marka, Amman, Jordane-mail: zalqodah@hotmail.com

M. Al-Busoul

Department of Mechanical Engineering, Amman College for Engineering Technology, Al-Balqa’ Applied University, P.O. Box 340558, Marka, Amman, Jordan

J. Heat Transfer 123(1), 157-161 (Jul 12, 2000) (5 pages) doi:10.1115/1.1336506 History: Received October 21, 1999; Revised July 12, 2000
Copyright © 2001 by ASME
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References

Liu,  Y. A., Hamby,  Keith, R., and Colberg,  Richard D., 1991, “Fundamental and Practical Developments of Magnetofluidized Beds, A Review,” Powder Technol., 64, pp. 3–41.
Filippov,  M. V., 1960, “The Effect of a Magnetic Field on a Ferromagnetic Particle Suspension Bed,” Prik. Magnet. Latv. SSR, 12, pp. 215–220.
Rosensweig,  R. E., 1979, “Fluidization: Hydrodynamic Stabilization with a Magnetic Field,” Science, 204, pp. 57–59.
Rosensweig,  R. E., 1979, “Magnetic Stabilization of the State of Uniform Fluidization,” Ind. Eng. Chem. Fundam., 18, pp. 260–265.
Penchev,  I., and Hristov,  J. Y., 1990, “Fluidization at Beds of Ferro-Magnetic Particles in a Transverse Magnetic Field,” Powder Technol., 62, pp. 1–11.
Syutkin,  V., and Bologa,  M. K., 1976, “Effect of Magnetic Field in Heat Transfer in Fluidized Bed,” Electron Obrab. Mater., 67, pp. 61–67.
Levenspiel, O., and Kamholtz, K., 1981, “Enhancing the Characteristics of Magnetically Stabilized Beds,” U.S. Pat. 427, 93.
Luccesi, P. J., Hatch, W. H., Mayer, F. X., and Rosensweig, R. P., 1979, “Magnetically Stabilized Beds: New Gas-Solids Contacting Technology,” Proc. 10th World Petroleum Congress, Bacharest, Heyden, Philadelphia, PA, 4 , pp. 419–425.
Neff,  J. J., and Rubinsky,  B., 1983, “The Effect of a Magnetic Field on the Heat Transfer Characteristics of an Air-fluidized Bed of Ferromagnetic Particles,” Int. J. Heat Mass Transf., 26, pp. 1885–1889.
Arnaldos,  J., Lazaro,  M., and Casal,  J., 1987, “The Effect of Magnetic Stabilization on the Thermal Behavior of Fluidized Beds,” Chem. Eng. Sci., 42, No. 6, pp. 1501–1508.
Qian,  R. Z., and Saxena,  S. C., 1993, “Heat Transfer From an Immersed Surface in a Magneto Fluidized Bed,” Int. Commun. Heat Mass Transfer, 20, No. 6, pp. 859–869.
Al-Qodah,  Z., Ivanova,  V., Dobreva,  E., Penchev,  I., Hristov,  J., and Petrov,  R., 1991, “Non-Porous Magnetic Support for Cell Immobilization,” J. Fer. Bioeng., 71, pp. 114–117.
Al-Qodah,  Z., 2000, “Hydrodynamic Behavior of Magneto Air-Lift Column in a Transverse Magnetic Field,” Can. J. Chem. Eng., 78, No. 3, pp. 458–467.
Al-Qodah,  Z., and Al-Hassan,  M., 2000, “Phase Holdup and Gas to Liquid Mass Transfer Coefficient in Magneto G-L-S AirLift Fermenter,” Chem. Eng. J., 79, pp. 41–52.
Botterill, J. S. M., 1975, Fluidized Bed Heat Transfer, Academic Press, New York.

Figures

Grahic Jump Location
Effect of the magnetic field intensity on the radial profiles of Nusselt number (Re=52,dp=0.52 mm, heater height=0.12 m)
Grahic Jump Location
Effect of heater height on the radial profiles of Nusselt number (Re=52,dp=0.74 mm, initial bed height=0.13 m)
Grahic Jump Location
Effect of particles diameter on Nuselt number at five different radial positions (heater height=0.12 m)
Grahic Jump Location
Variation of Nusselt number with magnetic field intensity at various Reynolds numbers (heater height=0.12 m)
Grahic Jump Location
Effect of particle diameter on the radial profiles of the heat transfer coefficient (Re=56, heater height=0.12 m)
Grahic Jump Location
The effect of Reynolds number on Nusselt number at various magnetic field intensities (Re=65.5, heater height=0.12 m,B=15 mT)
Grahic Jump Location
Temperature profiles in the bed at constant magnetic field intensity and different Reynolds numbers (B=20 mT, heater height=0.12 m)
Grahic Jump Location
Effect of Reynolds number on the bed gas holdup for various magnetic field intensities
Grahic Jump Location
Schematic of the experimental setup: (1) Gas entrance; (2) Polyethylene particles; (3) Flanges; (4) Supporting grid; (5) Heater; (6) Magnetic particles; (7) Magnetic system; (8) column; (9) Manometer; (10) Orifice; (11) Gas suction; (12) Details of the magnetic sheets; and (13) Details of the heater

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