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TECHNICAL PAPERS: Melting and Solidification

Conjugate Heat Transfer and Effects of Interfacial Heat Flux During the Solidification Process of Continuous Castings

[+] Author and Article Information
M. Ruhul Amin, Nikhil L. Gawas

Department of Mechanical & Industrial Engineering, Montana State University, Bozeman, MT 59717

J. Heat Transfer 125(2), 339-348 (Mar 21, 2003) (10 pages) doi:10.1115/1.1560146 History: Received May 02, 2002; Revised October 28, 2002; Online March 21, 2003
Copyright © 2003 by ASME
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References

Figures

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Problem domain in terms of dimensional parameters
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(a), (b) Effective heat transfer coefficient formulation
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Flow chart for the algorithm to incorporate effective heat resistance due to air gap
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Comparison of numerically obtained solidification front positions with analytical results by Siegel 21
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Comparison of numerically obtained solidification front positions with experimental data by Wolff and Viskanta 22
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Effect of withdrawal speed on solidification front: (a) θ0=1.2,Bi2=0.1,Bi3=0.15; and (b) θ0=1.2,Bi2=0.02,Bi3=0.05.
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Effect of withdrawal speed on non-dimensional local heat flux on the wall for θ0=1.2,Bi2=0.02,Bi3=0.05
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Effect of withdrawal speed on wall temperature for θ0=1.2,Bi2=0.1,Bi3=0.15
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Comparison of solidification front positions for θ0=1.2,Bi2=0.1,Bi3=0.15, (a) Pe=1.5, (b) Pe=2.0, (c) Pe=2.5, (d) Pe=3.0, and (e) Pe=4.0, Dotted line: Without interfacial heat flux, Solid line: With interfacial heat flux.
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Comparison of solidification front positions for θ0=1.2,Bi2=0.02,Bi3=0.05, (a) Pe=2.0, and (b) Pe=2.5, Dotted line: Without interfacial heat flux, Solid line: With interfacial heat flux.
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Variation of local heat flux for different superheats for Pe=1.5, Bi2=0.1,Bi3=0.15
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Comparison of solidification front positions with and without interface heat flux modeling for Bi2=0.1,Bi3=0.15. (a) Pe=1.5, θ0=1.2, (b) Pe=1.5, θ0=3.0, (c) Pe=2.0, θ0=1.2, and (d) Pe=2.0, θ0=2.5, Dotted line: Without interfacial heat flux, Solid line: With interfacial heat flux.
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Power law curve fit for the variation of non-dimensional air gap width with superheat at different withdrawal speeds (Bi2=0.1,Bi3=0.15)
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Overall heat flux variation with respect to mold cooling rate for θ0=1.2,Bi3=0.05, 0.1, 0.15 for different withdrawal speeds, (a) Pe=2.0, and (b) Pe=2.5

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