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TECHNICAL PAPERS

Modeling of Advanced Melting Zone for Manufacturing of Optical Fibers*

[+] Author and Article Information
Zhiyong Wei, Kok-Meng Lee

The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405

Zhi Zhou, Siu-Ping Hong

OFS Norcross, GA 30071

J. Manuf. Sci. Eng 126(4), 750-759 (Feb 04, 2005) (10 pages) doi:10.1115/1.1849032 History: Received November 01, 2002; Revised November 01, 2003; Online February 04, 2005
Copyright © 2004 by ASME
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References

Paek,  U. C., and Runk,  R. B., 1978, “Physical Behavior of the Neck-Down Region During Furnace Drawing of Silica Fibers,” J. Appl. Phys., 49, pp. 4417–4422.
Myers,  M. R., 1989, “A Model for Unsteady Analysis of Preform Drawing,” AIChE J., 35(4), pp. 592–602.
Xiao, Z., and Kaminski, D. A., 1997, “Flow, Heat Transfer, and Free Surface Shape During the Optical Fiber Drawing Process,” HTD Vol. 347, National Heat Transfer Conference, Vol. 9, ASME.
Choudhury,  S. R., Jaluria,  Y., and Lee,  S. H.-K., 1999, “A Computational Method for Generating the Free-Surface Neck-Down Profile for Glass Flow in Optical Fiber Drawing,” Numer. Heat Transfer, Part A, 35, pp. 1–24.
Lee,  K. H., and Viskanta,  R., 1999, “Comparison of the Diffusion Approximation and the Discrete Ordinates Method for the Investigation of Heat Transfer in Glass,” Glass Science and Technology-Glastechnische Berichte,72(8), pp. 254–265.
Chai,  J. C., Lee,  H. S., and Patankar,  S. V., 1994, “Finite Volume Method for Radiative Heat Transfer,” J. Thermophys. Heat Transfer, 8(3), pp. 419–425.
Liu,  J., Shang,  H. M., and Chen,  Y. S., 1997, “Prediction of Radiative Transfer in General Body-Fitted Coordinates,” Numer. Heat Transfer, Part B, 31(B), pp. 423–439.
Baek,  S. W., and Kim,  M. Y., 1997, “Modification of the Discrete-Ordinates Method in an Axisymmetric Cylindrical Geometry,” Numer. Heat Transfer, Part B, 31(B), pp. 313–326.
Yin,  Z., and Jaluria,  Y., 1997, “Zonal Method to Model Radiative Transfer in an Optical Fiber Drawing Furnace,” J. Heat Transfer, 119, pp. 597–603.
Siegel,  R., and Spuckler,  C. M., 1992, “Effect of Index of Refraction on Radiation Characteristics in a Heated Absorbing, Emitting, and Scattering Layer,” ASME J. Heat Transfer, 114, pp. 781–784.
Modest, M. F., 1993, Radiative Heat Transfer, McGraw-Hill, NY.
Viskanta,  R., and Anderson,  E. E., 1975, “Heat Transfer in Semitransparent Solids,” Adv. Heat Transfer, 11, pp. 317–441.
Wei,  Z., Lee,  K. M., Tchikanda,  S. W., Zhou,  Z., and Hong,  S. P., 2003, “Effects of Radiative Transfer Modeling on Transient Temperature Distribution in Semitransparent Glass Rod,” ASME J. Heat Transfer, 125(4), pp. 635–643, Aug.
Touloukian, Y. S., De Witt, D. P., and Hernicz, R. S., eds., 1973, Thermal Radiative Properties: Nonmetallic Solids, Vol. 8 of Thermophysical Properties of Matter, Plenum Press, New York, pp. 1569–1576.
Kesten,  S. Arthur, 1968, “Radiant Heat Flux Distribution in a Cylindrically-Symmetric Nonisothermal Gas With Temperature-Dependent Absorption Coefficient,” J. Quant. Spectrosc. Radiat. Transf., 8, pp. 419–434.
Jamaluddin,  A. S., and Smith,  P. J., 1988, “Predicting Radiative Transfer in Axisymmetric Cylindrical Enclosures Using the Discrete Ordinates Method,” Combust. Sci. Technol., 62, pp. 173–186.
Tannehill, J. C., Anderson, D. A., and Pletcher, R. H., 1997, Computational Fluid Mechanics and Heat Transfer, Taylor & Francis.

Figures

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Schematic illustrating the transient process
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Local orientation coordinate system in the 2D axi-symmetric cylindrical system
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Representative control solid angle in the local coordinate system
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Schematics illustrating the boundary conditions: (a) Gap between the two cylinders; (b) Interface of the glass rod
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Determination of the incident intensity unit vectors sf and sg
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Comparison of the FVM and the integral solutions: (a) Tg=500 K; (b) Tg=1500 K
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Effect of temperature gradient on thermal crack: (a) Radial temperature gradient at the tip of the gap; (b) Experimentally observed crack
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Comparison of radial temperature distributions: (a) Specular interface; (b) Diffuse interface
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Temperature contours in the baseline simulation (unit: K): (a) t=500 sec, Z/Lf=−0.03; (b) t=1170 sec, Z/Lf=0.16; (c) t=1700 sec, Z/Lf=0.3
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Contours of the divergence of the radiative flux ∇⋅q in the baseline simulation (unit: kw/m3 ): (a) t=500 sec, Z/Lf=−0.03; (b) t=1170 sec, Z/Lf=0.16; (c) t=1700 sec, Z/Lf=0.3
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Effect of initial joint length
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Different feeding profiles
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Comparison of radial temperature gradient at the tip of the gap

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