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ISSN Online: 2379-1748

7th Thermal and Fluids Engineering Conference (TFEC)
SJR: 0.152 SNIP: 0.14 CiteScore™:: 0.5

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Clarivate CPCI (Proceedings) Scopus
May, 15-18, 2022 , Las Vegas, NV, USA


Get access (open in a dialog) pages 589-598
DOI: 10.1615/TFEC2022.mpm.040800


Flow Mold Casting is a coaxial thermal fiber drawing process that starts from a preform with a crystalline core. It is a versatile stool for manufacturing multiscale, multimaterial and multifunctional particles and fibers for numerous applications. In this paper, the preform fabrication process of thermally drawn fibers with a crystalline core is examined numerically. The modeling approach is validated with experimental data obtained from the fabrication of a Pyrex-shell/Sn-core coaxial preform. A parametric study using the validated model is conducted. The objective is to provide a universal computational framework to aid process design, parameter optimization, and material selection. The model analyzes the impact of radiative and conductive heat fluxes on temperature distribution through the fiber radially and axially. In addition, the model predicts the melt length of the crystalline core during the preform fabrication process. The effect of heating power, length of heating zone, feeding speed, preform diameter, core diameter, and other relevant material properties on melt length is studied. Under the criteria that the melt length of the crystalline core is greater than zero while the maximum temperature in the cladding stays below its glass transition point, the model identifies the important parameters that dominates the preform fabrication, and provides guidance to the manufacturing process.