Predictive, miniature co-extrusion of multilayered glass fiber-optic preforms

Bhowmick, Kaustav and Furniss, David and Morvan, Herve and Seddon, Angela B. and Benson, Trevor M. (2016) Predictive, miniature co-extrusion of multilayered glass fiber-optic preforms. Journal of the American Ceramic Society, 99 (1). pp. 106-114. ISSN 1551-2916

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Abstract

A miniature co-extrusion technique, to produce a concentric multilayered glass fiber-optic preform of ~3 mm diameter, is modeled and experimentally demonstrated. A three-dimensional, incompressible, noncavitating, and nonisothermal Computational Fluid Dynamics (CFD) model, similar to one developed in our previous work, is used to predict the dimensions of an alternating four-layer glass stack feed required to produce the desired layer dimensions in a multilayered-glass preform extrudate, using a miniaturized and thus more economical co-extrusion. Strong agreement in the cross-sectional geometrical proportions of the simulated and experimentally obtained preform supports the prowess of the predictive modeling. Nevertheless, some small deviations between the simulated and experimentally obtained dimensions indicate topics for future rheological study. Performing the co-extrusion process under vacuum helps to minimize the inter-layer defects in the multi-layered fiber-optic preform. The miniature co-extrusion potentially removes the need for a postextrusion draw-down prior to fiber drawing, avoiding devitrification issues possible in non-oxide novel glass compositions.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Bhowmick, K., Furniss, D., Morvan, H. P., Seddon, A. B. and Benson, T. M. (2016), Predictive, Miniature Co-Extrusion of Multilayered Glass Fiber-Optic Preforms. J. Am. Ceram. Soc., 99: 106–114, which has been published in final form at http://dx.doi.org/10.1111/jace.13937. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1111/jace.13937
Depositing User: Morvan, Herve
Date Deposited: 07 Aug 2017 13:50
Last Modified: 08 Aug 2017 09:07
URI: http://eprints.nottingham.ac.uk/id/eprint/44724

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