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TECHNICAL PAPERS

Experimental Measurements of Velocity, Potential, and Temperature Distributions in Liquid Aluminum During Electromagnetic Stirring

[+] Author and Article Information
S. I. Bakhtiyarov, R. A. Overfelt

Mechanical Engineering Department, 202 Ross Hall, Auburn University, Auburn, AL 36849-5341

A. J. Meir, P. G. Schmidt

Department of Mathematics, 218 Parker Hall, Auburn University, Auburn, AL 36849-5310

J. Appl. Mech 70(3), 351-358 (Jun 11, 2003) (8 pages) doi:10.1115/1.1558082 History: Received December 11, 2001; Revised September 23, 2002; Online June 11, 2003
Copyright © 2003 by ASME
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References

Spitzer,  K.-H., Dubke,  M., and Schwerdtfeger,  K., 1986, “Rotational Electromagnetic Stirring in Continuous Casting of Round Strands,” Metall. Trans. B, 17B, pp. 119–131.
Zhang,  W., Yang,  Y., Liu,  Q., Zhu,  Y., Zhang,  Q., and Hu,  Z., 1998, “Effects of Electromagnetic Stirring and Water Cooling on Structure and Segregation in Centrifugally Cast Al-Si Eutectic Alloy,” Mater. Sci. Technol., 14, pp. 306–311.
Lim,  S. C., Yoon,  E. P., and Kim,  J. S., 1997, “The Effect of Electromagnetic Stirring on the Microstructure of Al-7 wt% Si Alloy,” J. Mater. Sci. Lett., 10, pp. 104–109.
Griffiths,  W. D., and McCartney,  D. G., 1996, “The Effect of Electromagnetic Stirring During Solidification on the Structure of Al-Si Alloys,” Mater. Sci. Technol., A216, pp. 47–60.
Griffiths,  W. D., and McCartney,  D. G., 1997, “The Effect of Electromagnetic Stirring on Macrostructure and Macrosegregation in the Aluminum Alloy 7150,” Mater. Sci. Technol., A222, pp. 140–148.
Currey,  D. A., and Pickles,  C. A., 1988, “Electromagnetic Stirring of Aluminum-Silicon Alloys,” J. Mater. Sci., 23, pp. 3756–3763.
Cho,  Y. W., Chung,  S. H., Shim,  J. D., Dement’ev,  S., and Ivanov,  S., 1999, “Fluid Flow and Heat Transfer in Molten Metal Stirred by A Circular Inductor,” Int. J. Heat Mass Transf., 42, pp. 1317–1326.
Branover, H., 1978, Magnetohydrodynamic Flow in Ducts, John Wiley and Sons, New York.
Ricou,  R., and Vives,  C., 1982, “Local Velocity and Mass Transfer Measurements in Molten Metals Using an Incorporated Magnet Probe,” Int. J. Heat Mass Transf., 25, pp. 1579–1588.
Gelfgat,  Yu. M., Gorbunov,  L. A., and Kolevzon,  V., 1993, “Liquid Metal Flow in a Finite-Length Cylinder With a Rotating Magnetic Field,” Exp. Fluids, 15, pp. 411–416.
Tokunaga,  H., Iguchi,  M., and Tatemichi,  H., 1999, “Turbulence Structure of Bottom-Blowing Bubbling Jet in a Molten Wood’s Metal Bath,” Metall. Trans. B, 30B, pp. 61–66.
Weissenfluh,  T., 1985, “Probes for Local Velocity and Temperature Measurements in Liquid Metal Flow,” Int. J. Heat Mass Transf., 28, pp. 1563–1574.

Figures

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Experimental apparatus used for local velocity and temperature measurements in molten metals and alloys
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Diagram of sample-magnetic field-optical furnace arrangement and heating energy focus action
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Contour lines for magnetic induction (in 104T) measured at different distances between magnets: (a) 12 cm; (b) 9 cm; (c) 8 cm; (d) 7 cm
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Variation of measured average magnetic induction with distance between magnets
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Schematic diagram of constructed permanent magnet probe (all dimensions are in millimeters)
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Experimental apparatus used for velocity probe calibration at Couette flow
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Response of the probe as a function of angular velocity for liquid aluminum, lead, tin, and low melting alloy LMA-158 (tip of the probe is located in ξ=y/(R2−R1) and ζ=2z/L)
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Calibration of magnet probe for liquid aluminum, lead, tin, and low melting alloy LMA-158
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Normalized velocity profile in the annular space between the cylinders
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Variation of the magnetic Reynolds number with the angular velocity for pure liquid lead, tin, aluminum and LMA-158 alloy samples
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Variation of hydraulic Reynolds number with the angular velocity for pure liquid lead, tin, and aluminum samples
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Variation of Ekman number with the angular velocity for pure liquid lead, tin, and aluminum samples (L=10 cm)
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Positions of magnetic probe inside the liquid metal sample
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Measured potential differences for liquid aluminum rotating in cylindrical container at different angular velocities (B=0)
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Measured and theoretical (for solid body) normalized velocity profiles for liquid aluminum rotating in cylindrical container at different angular velocities (B=0)
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Measured normalized velocity profiles for liquid aluminum rotating in cylindrical container at different inductions of magnetic field (ω=18.23 s−1 )
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Variation of azimuthal velocity with magnetic induction for liquid aluminum rotating in cylindrical container at different distances from axis of rotation (ω=18.23 s−1 )
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Normalized temperature profiles in rotating melt of aluminum (ω=18.23 s−1 , B=0,z=0)

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