Title

Transient Heat Transfer with Change of Phase in Porous Sand Mold During Casting Processes

Abstract

Transient moisture vaporization and condensation in the sand mold, and its interaction with the casting solidification have been studied by mathematical modeling. The moving distinct vaporization interface in the sand mold is handled by the front tracking technique. The alloy solidification is analyzed by the lumped-system approach and by the enthalpy method. The casting cooling rate, as well as the increasing dry sand zone and two-phase zone in the sand mold, are investigated for different mold moisture contents, mold thicknesses, and Biot numbers at the outer surface of the mold. The realistic temperature-dependent thermophysical properties of the sand mold and the casting are employed in the calculation. It is found that, for a 'thick' mold, the moisture content has a strong cooling effect on the casting solidification, owing to a more effective heat transfer mechanism in the two-phase zone.

Meeting Name

National Heat Transfer Conference 1989

Department(s)

Mechanical and Aerospace Engineering

Sponsor(s)

ASME, Heat Transfer Div, New York, NY, USA

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1989 American Society of Mechanical Engineers (ASME), All rights reserved.

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