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Numerical modeling of hollow optical fiber drawing process
Descriptive
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Title
Numerical modeling of hollow optical fiber drawing process
Name
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Yang
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Jing
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Jing Yang
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Jaluria
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Yogesh
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Advisory Committee
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Yogesh Jaluria
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Tse
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Stephen
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Advisory Committee
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Stephen Tse
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Lin
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Hao
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Advisory Committee
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Hao Lin
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internal member
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Harrington
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James
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Advisory Committee
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James A. Harrington
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Rutgers University
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Graduate School - New Brunswick
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theses
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2008
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2008-01
Language
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English
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electronic
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xx, 138 pages
Abstract
The hollow optical fiber drawing process has been numerically investigated. Axisymmetric, laminar and conjugated flows of gas in the central cavity, glass and aiding purge gas, were simulated in the model. A numerical scheme was proposed to correct the inner and outer surfaces of the hollow fiber. The optically thick approximation, as well as the zonal model, was applied to calculate the radiative transport within glass. The validation of the model was carried out. It is shown that the results from the model are consistent with the physical trends and agree well with the results in the literature. The effects of variable properties of air and buoyancy were investigated and results indicated that these effects are neglectable for simulating the draw process. The effects of physical parameters, such as the temperature distribution on the furnace wall, the drawing speed, the preform feeding speed, geometry of the preform and material properties, on the thermal transport, the neck-down profiles, the final collapse ratio and draw tension have been studied. Then, an appropriate objective function, comprised of the maximum velocity lag, E' and NBOHCs defect concentrations and draw tension, has been proposed to describe the quality of the hollow fiber. The feasible domain for hollow optical fiber drawing process was identified for optimal design. A multi-variable and non-constrained optimal design problem in hollow optical fiber drawing process has been solved by the univariate search and curve fitting method. Finally, collapse of Microstructured Polymer Optical Fibers (MPOFs) during the drawing process was investigated by a porous media model. Results provided the effects of parameters on the final porosity of MPOFs. This model has been validated by comparing with the results for solid-core and hollow fibers drawing processes.
Note
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Ph.D.
Note
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Includes bibliographical references (p. 133-137).
Subject
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Topic
Mechanical and Aerospace Engineering
Subject
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Topic
Optical fibers
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Graduate School - New Brunswick Electronic Theses and Dissertations
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rucore19991600001
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http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.17240
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ETD_657
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doi:10.7282/T3K937W5
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ETD doctoral
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Copyright protected
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Open
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Jing Yang
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Rutgers University. Graduate School - New Brunswick
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
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