Electromagnetic induction is considered as a means of altering convection during the solidification of a Pb–19 wt pct Sn alloy. Application of a time-varying magnetic field induces Lorentz forces, which augment thermal buoyancy forces in the melt and oppose solutal buoyancy forces in the mushy zone. A continuum model for binary solid–liquid phase change is extended to account for turbulence, and laminar and turbulent flow predictions are contrasted. Results indicate that turbulence decreases the propensity for channel development and macrosegregation by enhancing mixing and reducing the effective Lewis number from 8600 to near unity.
Issue Section:
Melting and Solidification
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7.
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,” Numerical Heat Transfer Part A
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9.
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,” AIAA Journal
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Prescott
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Incropera
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, “Numerical Simulation of a Solidifying Pb–Sn Alloy: The Effects of Cooling Rate on Thermosolutal Convection and Macrosegregation
,” Metall. Trans. B
, Vol. 22B
, pp. 529
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.11.
Prescott
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Bennon
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,” Int. J. Heat Mass Transfer
, Vol. 34
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Prescott, P. J., 1992, “Convection Transport Phenomena During Solidification of Binary Metal Alloys and the Effects of Magnetic Fields,” Ph.D. Thesis, Purdue University, West Lafayette, IN.
13.
Prescott, P. J., Incropera, F. P., and Gaskell, D. R., 1992, “The Effects of Undercooling, Recalescence and Solid Transport on the Solidification of Binary Metal Alloys,” in: Transport Phenomena in Materials Processing and Manufacturing, Charmchi et al., eds., ASME HTD-Vol. 196, pp. 31–39.
14.
Prescott
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Incropera
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,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 115
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16.
Prescott
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b, “Convective Transport Phenomena and Macrosegregation During Solidification of a Binary Metal Alloy—I. Numerical Predictions
,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 116
, pp. 735
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.17.
Prescott
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Incropera
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Gaskell
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1994
, “Convective Transport Phenomena and Macrosegregation During Solidification of a Binary Metal Alloy—II. Experiments and Comparisons With Numerical Predictions
,” ASME JOURNAL OF HEAT TRANSFER
, Vol. 116
, pp. 742
–749
.
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