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Magnetically damped convection during solidification of a binary metal alloy

Journal Article · · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
DOI:https://doi.org/10.1115/1.2910680· OSTI ID:5843527
;  [1]
  1. Purdue Univ., West Lafayette, IN (United States)
+ Show Author Affiliations

The transient transport of momentum, energy, and species during solidification of a Pb-19 percent Sn alloy is numerically simulated with and without magnetic damping. The system is contained in an axisymmetric, annular mold, which is cooled along its outer vertical wall. Since thermosolutal convection accompanies solidification and is responsible for final macrosegregation patterns, application of a steady magnetic field, which is parallel to the axis of the mold, has the potential to reduce macrosegregation by damping buoyancy-driven flow during solidification. Results show that, during early stages of solidification, the magnetic field significantly affects thermally driven flow in the melt, as well as interactions between thermally and solutally driven flows. However, interdendritic flows and macrosegregation patterns are not significantly altered by moderate magnetic fields. Scaling analysis reveals that extremely strong fields would be required to effectively dampen convection patterns that contribute to macrosegregation. 40 refs., 13 figs., 1 tab.

DOE Contract Number:
FG02-87ER13759
OSTI ID:
5843527
Journal Information:
Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 115:2; ISSN 0022-1481; ISSN JHTRAO
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360100* -- Metals & Alloys
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ALLOY SYSTEMS
ALLOYS
BINARY ALLOY SYSTEMS
CONVECTION
DAMPING
ELEMENTS
ENERGY TRANSFER
FLUIDS
HEAT TRANSFER
LEAD ALLOYS
LEAD BASE ALLOYS
LIQUID METALS
LIQUIDS
MAGNETIC FIELDS
MASS TRANSFER
MATHEMATICAL MODELS
MATHEMATICS
METALS
MOMENTUM TRANSFER
NUMERICAL ANALYSIS
PHASE TRANSFORMATIONS
SOLIDIFICATION
TIN ALLOYS
TRANSIENTS