The process of freeze coating of a binary substance on a chilled moving plate is studied theoretically with special emphasis on the behavior of the two-phase mushy zone. The flow and heat transfer in five separate regions of the system, i.e., the moving plate, the freeze coat, the two-phase packing region, the two-phase dispersed region and the molten substance region, are formulated mathematically to describe the freeze-coating process. A supplemental equation derived from a simplified phase diagram and an appropriate viscosity model are employed to complete the mathematical description of the two-phase mushy zone. The system of equations is solved by a combined analytical-numerical technique to determine the spatial variations of the solidus and liquidus fronts. Effects of seven controlling parameters, including the freeze coat-to-wall thermal ratio, the wall subcooling parameter, the molten substance superheating parameter, the Prandtl number, the Stefan number, the equilibrium partition ratio, and the packing limit fraction, on the behavior of the two-phase mushy zone and the freeze-coating process are determined.
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Technical Papers
Behavior of the Two-Phase Mushy Zone During Freeze Coating on a Continuous Moving Plate
C. Tangthieng, Graduate Student,
C. Tangthieng, Graduate Student
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
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F. B. Cheung, Professor, Fellow ASME,,
e-mail: fxc4@psu.edu
F. B. Cheung, Professor, Fellow ASME,
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
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S. W. Shiah, Chairman, Mem. ASME
S. W. Shiah, Chairman, Mem. ASME
Department of Naval Architecture and Marine Engineering, Chung Cheng Institute of Technology, Tao-Yuan, Taiwan
Search for other works by this author on:
C. Tangthieng, Graduate Student
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
F. B. Cheung, Professor, Fellow ASME,
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802
e-mail: fxc4@psu.edu
S. W. Shiah, Chairman, Mem. ASME
Department of Naval Architecture and Marine Engineering, Chung Cheng Institute of Technology, Tao-Yuan, Taiwan
Contributed by the Heat Transfer Division for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received by the Heat Transfer Division December 4, 2000; revision received August 17, 2001. Associate Editor: V. P. Carey.
J. Heat Transfer. Feb 2002, 124(1): 111-119 (9 pages)
Published Online: August 17, 2001
Article history
Received:
December 4, 2000
Revised:
August 17, 2001
Citation
Tangthieng, C., Cheung, F. B., and Shiah, S. W. (August 17, 2001). "Behavior of the Two-Phase Mushy Zone During Freeze Coating on a Continuous Moving Plate ." ASME. J. Heat Transfer. February 2002; 124(1): 111–119. https://doi.org/10.1115/1.1420714
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