Transient Heat Transfer with Change of Phase in Porous Sand Mold During Casting Processes
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.
K. C. Chiang and H. Tsai, "Transient Heat Transfer with Change of Phase in Porous Sand Mold During Casting Processes," American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, American Society of Mechanical Engineers (ASME), Jan 1989.
National Heat Transfer Conference 1989
Mechanical and Aerospace Engineering
ASME, Heat Transfer Div, New York, NY, USA
Article - Conference proceedings
© 1989 American Society of Mechanical Engineers (ASME), All rights reserved.