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An Investigation of the Viscous Flow Problem Associated with theHeating of the Glass Preform During Optical Fiber Processing

Published online by Cambridge University Press:  15 February 2011

Sara E. Rosenberg ,
Haris Papamichael  and
Ioannis N. Miaoulis
Sara E. Rosenberg
Affiliation:
Tufts University, Thermal Analysis of Materials Processing Laboratory, Mechanical Engineering, Department, Medford, MA 02155
Haris Papamichael
Affiliation:
Tufts University, Thermal Analysis of Materials Processing Laboratory, Mechanical Engineering, Department, Medford, MA 02155
Ioannis N. Miaoulis*
Affiliation:
Tufts University, Thermal Analysis of Materials Processing Laboratory, Mechanical Engineering, Department, Medford, MA 02155
*
* Author to whom correspondence should be addressed.
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Abstract

A thermal study of the optical fiber manufacturing process involves some ofthe most challenging, and in some cases, unsolved fundamental problems inheat transfer and fluid Mechanics. The heating stage of the process, wherethe glass cylinder (preform) is heated radiantly by the cylindrical mufflefurnace, greatly influences the resultant quality of the fiber. During theprocess a neckdown region is formed that is characterized by the stretchingof the glass. The two-dimensional transient equations of motion and Massconservation, with viscosity dependent on temperature, were solved to obtainthe velocity profiles in the glass and the shape of the neckdown region.Axial velocity contours and the neckdown profiles were examined for variousdrawing conditions. Differences between the new method presented here andexisting one-dimensional method were examined. The analysis can be used fordrawing of other materials such as metals and polymers, and the modeling isapplicable to other viscous liquids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 321: Symposium E – Crystallization and Related Phenomena in Amorphous Materials—Ceramics, Metals, Polymers, and Semiconductors , 1993 , 209
Copyright
Copyright © Materials Research Society 1994

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References

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