The thermal transport associated with optical fiber drawing at relatively high drawing speeds, ranging up to around 15 m/s, has been numerically investigated. A conjugate problem involving the glass and the purge gas regions is solved. The transport in the preform/fiber is coupled, through the boundary conditions, with that in the purge gas, which is used to provide an inert environment in the furnace. The zonal method, which models radiative transport between finite zones in a participating medium, has been employed to compute the radiative heat transfer in the glass. The flow of glass due to the drawing process is modeled with a prescribed free-surface neck-down profile. The numerical results are compared with the few that are available in the literature. The effects of important physical variables such as draw speed, purge gas velocity and properties, furnace temperature, and preform diameter on the flow and the thermal field are investigated. It is found that the fiber drawing speed, the furnace temperature, and the preform diameter have significant effects on the temperature field in the preform/fiber, while the effects of the purge gas velocity and properties are relatively minor. The overall heating of the preform/fiber is largely due to radiative transport in the furnace and the changes needed in the furnace temperature distribution in order to heat the glass to its softening point at high speeds are determined.
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Thermal Transport and Flow in High-Speed Optical Fiber Drawing
Zhilong Yin,
Zhilong Yin
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903
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Y. Jaluria
Y. Jaluria
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903
Search for other works by this author on:
Zhilong Yin
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903
Y. Jaluria
Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903
J. Heat Transfer. Nov 1998, 120(4): 916-930 (15 pages)
Published Online: November 1, 1998
Article history
Received:
March 3, 1998
Revised:
September 1, 1998
Online:
December 5, 2007
Citation
Yin, Z., and Jaluria, Y. (November 1, 1998). "Thermal Transport and Flow in High-Speed Optical Fiber Drawing." ASME. J. Heat Transfer. November 1998; 120(4): 916–930. https://doi.org/10.1115/1.2825911
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